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3 years ago

A student earns an 80% on their science test. If she got 20 questions correct, how many total were on the test?

Mathematics

1 answer:

galina1969 [7]3 years ago

5 0

25 questions
Explanation: 20 divided by 25 is .8 which is 80%

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A number N divided by -9 is -16

lianna [129]

Answer: no

Step-by-step explanation:

algebraic expression for "a number , n, divided by 4 is 4. I

3 0

3 years ago

I need help with 5 problems! Please actually help and don't just reply for points!

8090 [49]

Answer:

There is enough evidence to prove they are congruent. AAS would be what's used in this case.

Step-by-step explanation:

(< = angle)

<B = <Z, <A = <Y, line AC and line XY are equal.

Edit: So it appears that each of the photos are congruent. They have enough labels on them to tell you that their last unidentified angle would have to be congruent as well, meaning that each picture is congruent.

4 0

3 years ago

What's:<br><br> Find the slope of a line that passes through at (3,1) and (6,-5)

olga_2 [115]

Use the slope formula.
Y2 - Y1 / X2 - X1
(3,1) (6,-5)
-5 - 1 / 6 - 3
-6 / 3
slope = -2

4 0

3 years ago

Video rental stores are being replaced by streaming subscriptions. In one area, there were 10 video rental locations in 1996, bu

SSSSS [86.1K]

Answer:

The unit rate is -1 store per year

Step-by-step explanation:

Let

x -----> the number of years since 1996

y ----> the number of video rental stores

we know that

The year 1996 represent x=0

2016 represent ----> x=2016-1996=10 years

we have the points

(0,10) and (10,1)

The unit rate is equal to the slope of the linear equation

<em>Find the slope m</em>

$m=(1-10)/(10-0)$

$m=-1\ stores/year$ ----> is negative because is a decreasing function

therefore

The unit rate is -1 store per year

7 0

3 years ago

What is the area of a circle with a radius of 12 inches? Use = 3.14.

il63 [147K]

Area of a Circle : Pi(r) $^{2}$
Area: (3.14)(12 $^{2}$ )
Area: 452.16 inches squared.

7 0

3 years ago