Ask question

Ask question

All categories

3 years ago

13

A history test has 30 questions. A student answers 90% of the questions correctly. How many questions did the student get correc

t.

1 answer:

algol133 years ago

7 0

Answer:

27 questions

Step-by-step explanation:

Hope this helps!

You might be interested in

What is the solution to the system of equations?<br><br> y = 2x – 3.5<br><br> x – 2y = –14

zhenek [66]

1. x-2(2x-3.5)=-14
x-4x+7=-14
-3x=-21
x=7
2. y=2(7)-3.5
y=14-3.5
y=10.5
hope this helps!

4 0

3 years ago

For the figures below, assume they are made of semicircles, quarter circles and squares. For each shape, find the area and perim

Marina86 [1]

Area of the shaded region $$=36(\pi -2)$ square cm

Perimeter of the shaded region $=6 (\pi + 2\sqrt 2)$ cm

Solution:

Radius of the quarter of circle = 12 cm

Area of the shaded region = Area of quarter of circle – Area of the triangle

$$=\frac{1}{4} \pi r^2 - \frac{1}{2} bh$

$$=\frac{1}{4} \pi \times 12^2 - \frac{1}{2} \times 12 \times 12$

$$=36\pi -72$

$$=36(\pi -2)$ square cm.

Area of the shaded region $$=36(\pi -2)$ square cm

Using Pythagoras theorem,

$AC^2=AB^2+BC^2$

$AC^2=12^2+12^2$

$AC^2=288$

Taking square root on both sides of the equation, we get

$AC= 12\sqrt 2$ cm

Perimeter of the quadrant of a circle = $\frac{1}{4} \times 2\pi r$

$$=\frac{1}{4} \times 2 \times \pi \times 12$

$$=6 \pi$ cm

Perimeter of the shaded region = $6 \pi + 12\sqrt 2$ cm

$=6 (\pi + 2\sqrt 2)$ cm

Hence area of the shaded region $$=36(\pi -2)$ square cm

Perimeter of the shaded region $=6 (\pi + 2\sqrt 2)$ cm

6 0

3 years ago

What is the slope of the line

elixir [45]

The slope of the line is 3/4 and the y-intercept is -1

5 0

3 years ago

Read 2 more answers

How can you find the unit rate on a graph that goes through the origin?

Andrew [12]

Answer:

In an equation in the form , the unit rate is the number represented by the . If a graph of a line passes through the origin and contains the point , representing the unit rate, then the relationship is proportional.

Step-by-step explanation:

7 0

3 years ago

Draw a box-and-whisker plot of the data. 37, 34, 26, 33, 38, 36, 30

BARSIC [14]

I’m sorry this is messy but I hope this is right!! <3

8 0

3 years ago