Find the missing length in the similar figures.

The scores on a law school entrance exam are normally distributed with a mean of 250 and a standard deviation of 50. Suppose 320

Olegator [25]

$\mathbb P(X>284)=\mathbb P\left(\dfrac{X-250}{50}>\dfrac{284-250}{50}\right)=\mathbb P(Z>0.68)\approx0.248$

Out of 320 student, you should expect about 25% of them to score above 284, or about 80 students.

7 0

2 years ago

Please help me I will mark brainless .

Oksi-84 [34.3K]

I think it is line one because half of 32 isn’t 16.2
I hope this helps :)

7 0

2 years ago

Solve for y. -38 = 7v+17 – 12v

iren2701 [21]

Answer:

Step-by-step explanation:

$-38=7v+17-12v\qquad\text{subtract 17 from both sides}\\\\-38-17=7v+17-17-12v\qquad\text{combine like terms}\\\\-55=-5v\qquad\text{divide both sides by (-5)}\\\\\dfrac{-55}{-5}=\dfrac{-5v}{-5}\\\\11=v\to v=11$

6 0

3 years ago

Francisco finds a Web site that defines a regular hexagon as a "six-sided polygon with six congruent angles and six congruent si

andrey2020 [161]

Answer:

d.

Step-by-step explanation:

All regular hexagons fit this definition.

Any other figure does not fit the definition.

3 0

2 years ago

Can someone please help me with these 3, 7th grade math homework word problems. I will give brainliest and obviously a thanks

NikAS [45]

Answer:

Mia can spend no more than $55 at the mall. She buys a jacket for $23. Necklaces are on sale for $8. Find the amount of necklaces Mia can buy. Write and solve an inequality.

First, make the equation. She can't waste no more than(≥ or =) $55. And she already used $23.

55= 23+8(n)

n= number of necklaces she can buy.

Now, subtract 23 to both sides.

55= 23+8(n)

-23 -23

32= 8(n)

Then, divide by 8 to both sides to find how many necklaces she can buy.

32= 8(n)

8 8

4=n So, she can buy 4 necklaces.

A bag of marbles contains 3 red, 5 blue and 2 yellow marbles. What is the probability of choosing a blue marble and then choosing a red marble without replacement. Simplify the fraction.

First, add up the whole amount of marbles.

3+5+2= 10

This is very simple, to find the probability, just put...

number of blue marbles

total number of marbles

This gives you, 5/10 and simplified into 1/2.

For the red marble, do the same thing.

number of red marbles

total number of marbles

This gives you, 3/10 and it can't be simplified.

A football team loses 5 2/3 yards on the first play. On the next play, they gain 2 3/4 yards. What is the overall increases or decreases in yards?

For this word problem, add 2 3/4 yards to 5 2/3 yards to find the overall decrease or increase in yards.

Solve the whole number parts..

5-2= 3

Solving the fractions part...

2 - 3 = 8 - 9 = - 1

3 4 12 12 12

3- 1/12= 2 11/12

So, it was a 2 11/12 decrease.

3 0

2 years ago