Sarah wrote the whole numbers from 1 to 85 on a sheet of paper. How many times did Sarah write the digit 7?

Answers

Answer 1

Answer:

18

Step-by-step explanation:

7, 17, 27, 37, 47, 57, 67

70, 71, 72, 73, 74, 75, 76, 77, 78, 79


Related Questions

Will give brainliest! ASAP
What is the value of the prism?
Pls help I need ASAP

Answers

Answer: 36 cubic inches

Explanation:

There are 6 blocks across the width, 3 blocks along the height, and 2 blocks along the depth.

The volume is 6*3*2 = 18*2 = 36 cubic inches. In other words, there are 36 small blocks that make up this bigger 3D solid.

12


math



pls help geniuses!!
——————————-

Answers

Answer:

The answer is C .

Step-by-step explanation:

Here
The answer stepp by step

Write three rational numbers between −1 /5 and 1 /2

Answers

Answer:

-1/10, 2/10, and 4/10

Step-by-step explanation:

A rational number is a number that is in the form of p/q, where p and q are integers, and q is not equal to 0.

First, what is the lcm of 5 and 2? the lcm is 10, because that is the lowest number than can be divided separately by 5 and 2 and the results would still be a whole number.

We now need to find 3 rational numbers between -2/10 and 5/10. It's easy now that I've explained it, right?

-1/10, 2/10, and 4/10 are between -1/5 and 1/2 and are integers with the given explanation.

Hope this helps.

Solve x2 = 121.
if you can help me it would be great

Answers

Answer:

The answer is X=11 and X=-11

Step-by-step explanation:

[tex] {x}^{2} = 121 \\ \sqrt{121} = 11 \\ therefore \: value \: of \: x \: is \: 11[/tex]

help me pleaseeeeeeeeeeee

Answers

O.6 easy because of the answer that is why

Crystal is training for a marathon. She wants to run 24 miles each week. She has run 16.5 miles this week. Solve an equation to determine how many more miles M she needs to run this week. What does M =?

Answers

Answer:

M=7.5

Step-by-step explanation:

hope this helps!

What is the measure of X?
108°
108°
2x
2x
72°
144
36
360°

Answers

We know that the interior angles of a trapezoid
add up to 360 degrees.
Write out an equation to represent this situation;
108+108+2×+2x=360
216+4×=360
4×=360-216
4x=144
x=144/4
×=36
Therefore, the measure of × is 36 degrees.

Answer:

36°

Step-by-step explanation:

108°+ 108°+ 2x+ 2x =360°

4x +216° = 360°

4x= 360°- 216°

Just X= 144°/4

=36°

2x= 2(36)

= 72°

2. There are 15 empty seats and 25 occupied seats on a school bus. What is the ratio of the number of empty
seats to the number of occupied seats?

Answers

Answer:

15/40 seats

Step-by-step explanation:

tamang sagot po yan

#carry on learning

WILL GIVE BRAINLIEST
What is the value of the coefficient of the 5th term in the expansion of (a + b) ^6
a. 20
b. 6
c. 10
d. 15​

Answers

Answer:

D. 15

Step-by-step explanation:

I assume you know what pascal's triangle is if this is the work you must complete. If not, I have attached it below.

Now, raising (a+b) to the 6th term would expand to this, based on Pascal's triangle

[tex]\left(a+b\right)^6 = \quad a^6+6a^5b+15a^4b^2+20a^3b^3+15a^2b^4+6ab^5+b^6[/tex]

Remember that terms are separated by addition or subtraction symbols.

The 5th term of this 7 term expansion would be 15a^2b^4. The coeffecient is 15 in this case.

~~~~~~~~~~~~~~~~~~~~~~~~

Let me know if you have any questions! Spread the Love.

1/2+1/3 how much is this and can u help with the simplify

Answers

Answer:

5/6

Step-by-step explanation:

Find a common denominator for 1/2 and 1/3.

6

Then find the amount it equals to when 6 is the denominator

1/2 = 3/6

1/3 = 2/6

Now add them

2/6 + 3/6 = 5/6

Answer:

Combine the fractions by finding a common denominator.

Exact Form:

5/6

Decimal Form:

0.8¯3 (bar notation)

Step-by-step explanation:

Hope this helps =)

what is the value of x in the triangle

Answers

[tex] \huge \boxed{ \tt x = 83 {}^{\circ} }[/tex]

x + 47 + 50 = 180 (sum of angles of triangle = 180°)

x + 97 = 180°

x = 180° -97

x = 83 °

Trina is looking at a scale drawing with a scale of 4 inches = 200 miles. how can she simplify the scale to evaluate 1 inch on the drawing?

Answers

200/4 = 50

1 inch can be represented as 50 miles

Please like and brainliest

Please solve these 2 ;-;

y = 2x – 6
y = –4x + 3

Answers

Answer:

x = 3/2 | y = -3

Step-by-step explanation:

Given equations:

y = 2x - 6. . . .(i)y = -4x + 3. . . . (ii)

Substituting from equation (i) for y:

==> 2x - 6 = -4x + 3

==> 2x + 4x = 6 + 3

==> 6x = 9

dividing both sides by 3:

==> 2x = 3

==> x = 3/2

Substituting 3/2 for x in equation (i):

==> y = 2(3/2) - 6

==> y = 3 - 6

==> y = -3

[tex] - 4x + 3 = 2x - 6 \\ 6x = - 9 \\ 2x = - 3 \\ x = - 1.5[/tex]

During the month of February, Lerato sends one SMS per day to relatives. Calculate how much this activity costs her in rands

Answers

Considering a linear function, it is found that this activity costs 240 rands.

What is a linear function?

A linear function is modeled by:

[tex]y = mx + b[/tex]

In which:

m is the slope, which is the rate of change, that is, by how much y changes when x changes by 1.b is the y-intercept, which is the value of y when x = 0, and can also be interpreted as the initial value of the function.

In this problem, we suppose that:

There is a fixed cost of 100 rands, hence b = 100.Each SMS costs 5 rands, hence m = 5.

Hence, the cost of sending x messages is given by:

y = 5x + 100.

February has 28 days, hence:

y = 5(28) + 100 = 240

This activity costs 240 rands.

More can be learned about linear functions at https://brainly.com/question/24808124

Three Step Linear Equations

Solve for x
8x+5=-6x+3

Answers

Answer:

x = -1/7   or  -0.14285 - in decimal form

Step-by-step explanation:

8x + 5 = -6x + 3

8x + 6x = 3 - 5       { change side }

14x = -2                  { basic addition and subtraction }

x = -2/14                 { changing sides }

x = -1/7                    { simplified }

ight i knew this but forgot a lil so can u tell me the answer and explan it to me?

Answers

Answer:

30

Step-by-step explanation:

All straight line equations are in the form:

[tex]y=mx+c[/tex]

Where m is the gradient and c is the y-intercept

In this equation +30 is the y-intercept

Answer:

The y-intercept is 30 in this equation

Step-by-step explanation:

This equation is in slope-intercept form.

Slope intercept form includes two things, (you can probably already guess)

It includes the slope of the line and the y-intercept

In all slope-intercept form equations the 20x would be the slope and the 30 would be the y-intercept

So that should be enough to give you your answer! I hope this helps and please award brainliest if possible!

They buy 400g with costs 2.56 how much would 350g cost

Answers

Answer:

2.24

Step-by-step explanation:

First I calculated the price for one g with the equation 2.56/400g.

I got .0064 per gram.

You can then multiply this by the 350g to get 2.24

Hope this helps

Jackie needs at least 350 for a plane ticket. She saves 25 each week. Which number line shows how long she will need to save money

Answers

Answer:

C. x ≥ 14

Step-by-step explanation:

Set inequality and solve:

25x ≥ 350x ≥ 350/25x ≥ 14

Correct choice is C

[tex]25x ≥ 350[/tex]

[tex]x ≥ \frac{350}{25}[/tex]

[tex]x ≥ 14[/tex]

Answer is C option

Solve the simultaneous equations
4x + 2y = -1
5x – 3y = 7

Answers

Answer: (x,y)=(1/2,-3/2)

Answer:

4x-2y=-1  multiply by 3

5x-3y=7  multiply by 3

12x+6y=-3

10x-6y=14  add them

so =22x=11

   x=1/2

5(1/2)-3y=7

2.5-3y=7 take 2.5 to the other side

-3y=4.5

y=-3/2  

therefore x=1/2 and y=-3/2

Step-by-step explanation:

8÷22+1
this was too hard

Answers

1.3636363636…. Goes on forever


Explanation: divide 8 by 22 and then add one

Best answer will get Five stars and a crown

Answers

Answer:

[tex]x ∈ R,a=1[/tex]

Step-by-step explanation:

i believe this is the answer but i am not 100% sure

Answer: It does not

Step-by-step explanation:

To buy a car, Rachel
borrowed $3,000 at
946 interest per
year for 3 years
How much money
did she have to pay
back?

Answers

Answer:  (3000)*(0.09)*(4) = $1,080.00

Step-by-step explanation:

When money is borrowed, interest is charged for the use of that money over a certain period of time. The amount of interest charged depends on the amount of money borrowed, the interest rate and the length of time for which the money is borrowed.

Principal is the amount of money borrowed. The interest rate is given as a percent. Time is the length of time in years for which the money was borrowed.

Interest = Principal * Rate * Time which is also written as I = P*R*T

Principal = $3,000, Interest rate = 0.09 and Time = 4

Raquel had to pay back $3,000 in principal plus $1,080 in interest for a total of $4,080.00

(3000)*(0.09)*(4) = $1,080.00

Could I get some help, please?

Answers

Answer:

19+j=59

Step-by-step explanation:

Sum means adding and "and" in math means +

please someone help me this is math and you will get points

Answers

Step-by-step explanation:

i) C = πd

C = π × 20yd

C = 20π yards

ii) A = πr²

A = 3.14 × 3²

A =28.26 m²

note that the radius here is 6/2 = 3m.

Twice a number is 500 more than six times the number. What is the number?


Answers

NUMBER

Question:

» Twice a number is 500 more than six times the number. What is the number?

Answer: [tex] \color{hotpink}{ \bold{- 125}}[/tex]

— — — — — — — — — —

Solution:

Let the number be x.

Then,

[tex]2x = 6x + 500 \\ 2x - 6x = 500 \\ \: \: \: \: \: \: \: - 4x = 500 \\ \: \: \: \: \: \: \: \: \frac{ \cancel{- 4}x}{ \cancel{- 4}x} = \frac{500}{ - 4} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: x = \underline{ \boxed{ \blue{ - 125}}}[/tex]

Hence, the number is -125.

Using algebraic expression, the number is calculated as: -125.

What is an Algebraic Expression?

An algebraic expression involves using numbers and variables to make statements.

Let the unknown number be represented as x. Therefore:

Twice the number is 2x

2x is 500 more than 6x is 2x = 6x + 500

Solve the algebraic equation to find the number (x):

2x = 6x + 500

2x - 6x = 500

-4x = 500

x = -500/4

x = -125

Thus, using algebraic expression, the number is calculated as: -125.

Learn more about algebraic expression on:

https://brainly.com/question/2164351

Solve the system of equations using subtraction.
2x - 3y = -5
2x + y = 7
The solution is . (Type an ordered pair.)

Answers

Answer:

x = 2 and y = 3

Step-by-step explanation:

given:

2x - 3y = -52x + y = 7

using elimination rule:

 2x - 3y = -5

- 2x - y = - 7

................................

-4y = -12

y = 3

Find x:

2x - 3y = -5

2x - 3(3) = -5

2x - 9 = -5

2x = - 5+9

2x = 4

x = 2

Answer:

[tex]y=3\\x=2\\[/tex]

Step-by-step explanation:

[tex](2x-3y)-(2x+7)\\=-4y=(-5)-(7)\\-4y=-12\\y=12/4\\y=3[/tex]

Insert y=3 into any one equation in the system of equations:

[tex]2x-3(3)=-5\\2x-9=-5\\2x=4\\x=4/2\\x=2[/tex]

or

[tex]2x+(3)=7\\2x=4\\x=4/2\\x=2[/tex]

The volume of a cube is 8 cubic inches. What is the length of each side of the cube?

Answers

Answer:

if a cube has a volume of 8 it has a side length of 2 so the answer is 2

This is the graph of the function f(x) = k(3). The value k is a constant. Based on the graph, what is the value of k

Answers

By using the graph, we will see that k = 1.85

How to find the value of K?

Here we have the exponential function:

f(x) = k*(3)^x

And we want to find the value of k.

To find it, we need to use one point on the graph. the only one easy to read is the one for x = 3, we can see that when x = 3, f(x) = 50.

Then we have:

f(3) = 50 = k*(3)^3 = k*(3*3*3) = 27*k

Solving that for k we get:

50 = 27*k

50/27 = k = 1.85

If you want to learn more about exponential functions, you can read:

https://brainly.com/question/11464095

An observer (O) spots a plane flying at a 55° angle to his horizontal line of sight. If the plane is flying at an altitude of 21,000 feet, what is the distance (x) from the plane (P) to the observer (O)? A right triangle is shown with angle O marked 55 degrees, hypotenuse marked x, and height marked 21,000 feet. 20,793 feet 25,636 feet 28,793 feet 36,585 feet.

Answers

Angle of elevation is angle measured from horizontal line to line of sight, The distance from the plane to the observer is 25,636 feet approx

What is angle of elevation?

You look straight parallel to ground. But when you have to watch something high, then you take your sight up by moving your head up. The angle from horizontal line to the point where you stopped your head is called angle of elevation. See the figure where angle OPD is the angle when observer saw the plane. It  is measured from the horizontal line OD.

Refer to the attached figure.

It is given that we have

Length of PD = |PD| = 21,000 feet

Angle ∠OPD = 55°

Assuming length of OP = |OP| = x feet, we get the sin ratio as

[tex]sin(55^\circ) = \dfrac{|PD|}{|OP|} = \dfrac{21000}{x}\\\\x = \dfrac{21000}{\sin(55^\circ)} \approx 25636.27 \approx 25636 \: \rm feet[/tex]

(tan 55°  was calculated from online calculator)

Thus,

The distance from the plane to the observer is 25,636 feet approx.

Learn more about trigonometric ratios here:
https://brainly.com/question/22599614

Answer:

B. 25,636 ft.

Step-by-step explanation:

Cause I'm Asian, I make the rules here...

polynomials are named by the highest exponent of the variable as well as the number of terms. For example, x^5-3x^2-1 is a quintic trinomial. Quintic is the exponent of 5, which is the highest while trinomial implies three terms. Using the above example, name the following polynomial expressions: 4x^2+x-3
3/5v^3(3v^2-9)
36m^6 - 9n^2​

Answers

Answer:

Step-by-step explanation:

[tex]4x^{2} + x - 3 \ Quadratic \ polynomial \ [ highest \ exponent \ is \ 2 ][/tex]

[tex]\dfrac{3}{5}v^{3}(3v^{2} -9)=\dfrac{3}{5}v^{3}*3v^{2}-\dfrac{3}{5}v^{3}*9=\dfrac{9}{5}v^{5}-\dfrac{27}{5}v^{3}[/tex]

Highest exponent is 5 and number of terms is 2. So, quintic  binomial

[tex]36m^{6}-9n^{2}[/tex]

Highest exponent is 6 and two terms. So, hexic binomial

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