You and eight friends plan a surprise party. Each of you contributes the same amount of
money m for food. Their mom also contributes $20.
a. Write an algebraic expression for the total amount of money contributed for food.
b. Evaluate your expression if each person contributed $10.50

Answer:

Step-by-step explanation:

(-1,4) (-1,3)

formula y2-y1/x2-x1

=3-4/-1-(-1)

= -1/-2

Answer:

90

Step-by-step explanation:

2 presents per 4 minutes is 30 presents per hour multiplied by 6 hours is 90 presents

Answer:

See below.

Step-by-step explanation:

(2v+2)(3v-2)

6v²-4v+6v-4

6v²-2v-4

-hope it helps

(Also, I'm great at algebra, so let me know if you need anymore help.)

Step-by-step explanation:

2v (3v-2)+2 (3v-2)

6v^2-4v+6v-4

6v^2+2v-4

Answer:

26 million

Step-by-step explanation:

x = total number in million

28% * x = 7.2

so x = 7.2/0.28 = 25.7 ≈ 26

1)

m = 3√2√2

= 6

n = a

= 3√2

Answer = D) m = 6 , n = 3√2

2)

m = n = a

m = 3

n = 3

Answer = A

Answer:

x=16

Step-by-step explanation:

If both pairs of opposite sides of a quadrilateral are congruent then the quadrilateral is a parallelogram

Answer:

62.5meteres

Step-by-step explanation:

using the formula speed =distance/time

12.5= ?/5

?= 12.5 × 5

? = 62.5 meters

Answer:

3 units down

Step-by-step explanation: hope this helps

Answer:

I am assuming any number in between these two, so let's just say 6,550.

Step-by-step explanation:

If you count up from 6,534, you will eventually get to 6,550. If you continue to count up, you will eventually reach 6,565 which is bigger than 6,550.

Answer:

a pair of glasses costs $17

a hat costs $21

Step-by-step explanation:

h = hat

g = glasses

3h + 4g = 123

1h + 3g = 66

multiply the 2nd equation by 3

3h + 9g = 198

negate everything in the 1st equation and add it to the 'new' 2nd equation

    3h  + 9g = 198

+  -3h  - 4g = -123

5g = 75

g = 15

substitute the 15 in either one of the 1st equations

1h + 3(15) = 66

h + 45 = 66

h = 66-45

h = 21

to check, substitute both g=15 and h=21 into BOTH 2 original equations.

Answer:

18/2 : 9

Step-by-step explanation:

Answer:

[tex] 9 \sqrt{3 } -12 \sqrt{4} \\ 3 \sqrt{9 \times 3} - 3 \sqrt{16 \times 4 } \\ from \: here \: we \: see \: that \: the \: square \: root \: of \: 9 \: is \: 3 \: and \: square \: root \: of \: 16 \: is \: 4 \: so fnal \: answer \: is \\ 9 \sqrt{3} - 12 \sqrt{4} [/tex]

Step-by-step explanation:

from the question we see root 27 and root 64

so what we do next is we look for two numbers that we can multiply together to give 27 and 64 in which one if the number is a perfect square

for root 27 we use 9 and 3

for root 64 we use 16 and 4

Answer:

sorry but i can not see clearly sorry

Step-by-step explanation:

i am realy realy sorry :( :(

Answer:

1.82 %

Step-by-step explanation:

Divide 100% among 55 students

[tex]\frac{100}{55} =1.82[/tex]

Hope this helps

Answer: (-4, -7)

Step-by-step explanation: To solve this system of equations, we can use the substitution method.

To solve a system by substitution, we first need to isolate one of our variables. The problem is none of our variables has a coefficient of 1 or -1. In this situation, we have to look at our next best option.

In our first equation, add 2x to both sides to get

2y = -6 + 2x and just divide both sides by 2 to get y = -3 + x.

Now let's plug this value of y into our second equation.

So we have 3x + 7(-3 + x) = -61.

Simplifying from here:

3x - 21 + 7x = -61

10x - 21 = -61

10x = -40

x = -4

Since we know that x = -4, we can just plug a -4 into our equation that we created earlier to get y = -3 + (-4) or y = -7.

Since x = -4 and y = -7, our answer is the ordered pair (-4, -7).

this is the answer hope it helps

Answer:

3x/(x-3) (x+1)

Step-by-step explanation:

The angle of depression from you to your friend is 54.1°

Trigonometric ratio is used to show the relationship between the sides and angles of a right angled triangle.

Let θ represent the angle between me in air and my friend, hence:

tanθ = 326 / 450

θ = 35.9 degrees

The angle of depression = 90 - 35.9 = 54.1°

The angle of depression from you to your friend is 54.1°

Find out more on Trigonometric ratios at: https://brainly.com/question/24349828

Answer:

x = 7[tex]\sqrt{3}[/tex]

Triangle area formula: base * height * 1/2

We are given:

Base - 14 cm

Height - x

Using the pythagorean theroem (a^2 + b^2 = c^2) we can figure out the height.

We are given:

Side a - 14 / 2 = 7 cm

Side b - the height (x)

Side c - 14 (it's an equilateral triangle)

Now, substitute the given values:

7^2 + x^2 = 14^2

49 + x^2 = 196

x^2 = 147

x = [tex]\sqrt{147}[/tex]

x = 7[tex]\sqrt{3}[/tex]

Answer:

90x8+3

Step-by-step explanation:

X2-12x+36 = 90.

X=

O x=6+3./10

O x=6+2/7

X= 123.22

O

x= 12+3/10

Answer:

Step-by-step explanation:

a) 126 122 118 114 110, 106, 102, 98

Hint: ( Subtract 4 from each numbers to get the next)

b) -1, 3 , 7, 11 , 15,  19, 23, 27

Hint: ( Add all through by 4)

c)  1, 3, 9, 27, 81, 243, 729

Hint: ( Multiply through by 3)

d) 80, 20 , 5, 1.25, 0.3125, 0.078125, 0.0195

Hint; (Divide all through by 4)

Answer:

7:10

Step-by-step explanation:

…..

because boys number is 7 and girl number is 10 so

Answer: 1 13/15

Hope this helps!

Answer:

For this, you need to click the second one.

Step-by-step explanation:

Answer:

false

Step-by-step explanation:

steps:

12+56=7

simplify 12+56: 68

12+56

add the numbers: 12+56=68

=68

68=7

the sides are not equal

false

Answer:

I think june at the earliest

Answer:

Ya and you have 2 tests i think

Answer:

The horizontal line is to the y-axis

Step-by-step explanation:

Turn the equation into a slope-intercept form equation:

[tex]8y=3x+12[/tex]

Divide each side by 8 to simplify y:

[tex]y=\frac{3}{8} x+1.5[/tex]

The slope is 3/8.

Using the format:

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

3/8 is in place of m, the slope.