Help math math math math

Answer:

A

Step-by-step explanation:

when X = 0 then

1 - 1/ (1 - 3)*(1+1)

0/ -4

0

Using the normal distribution, it is found that there is a 0.0228 = 2.28% probability that X will be smaller than 80.

In a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

In this problem:

The probability that X will be smaller than 80 is the p-value of Z when X = 80, hence:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{80 - 100}{10}[/tex]

[tex]Z = -2[/tex]

[tex]Z = -2[/tex] has a p-value of 0.0228.

0.0228 = 2.28% probability that X will be smaller than 80.

More can be learned about the normal distribution at https://brainly.com/question/24663213

Answer:

3 units down

Step-by-step explanation: hope this helps

Answer:

x=16

Step-by-step explanation:

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: (-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).

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.

Answer:

sorry but i can not see clearly sorry

Step-by-step explanation:

i am realy realy sorry :( :(

Answer:

For this, you need to click the second one.

Step-by-step explanation:

Answer:

1.82 %

Step-by-step explanation:

Divide 100% among 55 students

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

Hope this helps

Answer:

62.5meteres

Step-by-step explanation:

using the formula speed =distance/time

12.5= ?/5

?= 12.5 × 5

? = 62.5 meters

Answer:

Side = 5ft Side = 15 ft side = 3 ft

Step-by-step explanation:

Answer:

x=60°

Step-by-step explanation:

The Sum of all sides of a pentagon is 540°

And in the figure there are 2 sides with 150° and 90°

Now we have,

[tex]90+90+150+150+x=540\\\\480+x=540\\\\x=540-480\\\\x=60[/tex]

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:

[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:

26 million

Step-by-step explanation:

x = total number in million

28% * x = 7.2

so x = 7.2/0.28 = 25.7 ≈ 26

Answer:

90

Step-by-step explanation:

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

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:

2 times. 3.9x2=7.8

Step-by-step explanation:

3+3=6

0.9+0.9=1.8

6+1.8=7.8

Answer: the answer is 2

Step-by-step explanation:

1. 5 x 2 = 10

2. 12 -10 = 2

hope this helps!!

Answer:

I think june at the earliest

Answer:

Ya and you have 2 tests i think

Answer:

63 degrees

Step-by-step explanation:

angle B and angle D are opposite interior angles, and therefore they have the same measurements. IM NOT SURE IF THIS IS THE CORRECT EXPLANATION, I LEARNED THIS A REALLY LONG TIME AGO AND SO I KIND OF FORGOT!!! SORRY

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

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:

Step-by-step explanation:

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

formula y2-y1/x2-x1

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

= -1/-2

Answer:

18/2 : 9

Step-by-step explanation:

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