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3 years ago

1. On a 20 question test, Sarah got 2 questions wrong. What percent of the test does he have correct?

Mathematics

2 answers:

Lelechka [254]3 years ago

8 0

Answer:

1.) 80% if each question is 1 point

2.) 160 people

Step-by-step explanation:

e-lub [12.9K]3 years ago

3 0

Answer:

1=90%

Step-by-step explanation:

20-2=18, 18/20=90%

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What is the square root of 50.8 *SIMPLIFIED*?

lord [1]

I hope this helps you

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3 years ago

A group of dental researchers are testing the effects of acidic drinks on dental crowns. They have five containers of crowns lab

mestny [16]

Answer:

$\begin{array}{cccccc}{x} & {V} & {W} & {X} & {Y} & {Z} & P(x) & {0.20} & {0.20} & {0.20} & {0.20} & {0.20} \ \end{array}$

Step-by-step explanation:

Given

$S = \{V,W,X,Y,Z\}$

$n(S) = 5$

Required

The probability model

To do this, we simply calculate the probability of each container.

So, we have:

$P(V) = \frac{n(V)}{n(S)} = \frac{1}{5} = 0.20$

$P(W) = \frac{n(W)}{n(S)} = \frac{1}{5} = 0.20$

$P(X) = \frac{n(X)}{n(S)} = \frac{1}{5} = 0.20$

$P(Y) = \frac{n(Y)}{n(S)} = \frac{1}{5} = 0.20$

$P(Z) = \frac{n(Z)}{n(S)} = \frac{1}{5} = 0.20$

So, the probability model is:

$\begin{array}{cccccc}{x} & {V} & {W} & {X} & {Y} & {Z} & P(x) & {0.20} & {0.20} & {0.20} & {0.20} & {0.20} \ \end{array}$

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2 years ago

Trevor solved the system of equations below. What mistake did he make in his work?

wariber [46]

2x + y = 5

x − 2y = 10

y = 5 − 2x

x − 2(5 − 2x) = 10

x − 10 + 4x = 10

5x − 10 = 10

add 10 to each side

5x-10+10 = 10 + 10

5x=20

5x = 0 this is the error

He needs to add 10 to each side

7 0

3 years ago

What is 23 1/3 as an improper fraction

katen-ka-za [31]

Answer:

70/3

Step-by-step explanation:

Multiply: 23*3
23*3=69
Add: 69+1
69+1=70
70/3

Hope this helped!! :)

Brainliest?!?!

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3 years ago

Simplify completely the quantity x squared plus x minus 12 over quantity x squared minus x minus 20 divided by the quantity 3 x

amm1812

Answer:

Answer: 4(x+1) over (x-5)

Step-by-step explanation:

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3 years ago