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Nostrana [21]
3 years ago
14

a student answers 90% of the questions on a math exam correctly. if he answers 27 questions correctly how many questions are on

the exam?
Mathematics
1 answer:
kodGreya [7K]3 years ago
6 0

Answer:

30

Step-by-step explanation:

You might be interested in
20 POINTS
denis-greek [22]

Answer:

c. 441ft^2

Step-by-step explanation:

Area is height times length and since it's a square, safe to say that the sides are equal in length. So square root both of the given areas of the 2 square:

\sqrt{841} = 29

\sqrt{400} = 20

Now u have side b and c of the triangle, it's a right triangle so use the Pythagorean theorem a^2 + b^2 = c^2

a^2 + b^2 = c^2

a^2 + 20^2 = 29^2

a^2 + 400 = 841

subtract 4 from both sides

a^2 = 441

square root both sides

\sqrt{a^2} = \sqrt{441}

a = 21

Now the side a of the triangle is also a side of the small square therefore

21^2 = 441

8 0
3 years ago
Gradinize cheese costs $1.28 per pound. How much would you pay for 7 pounds ?
Alenkasestr [34]

Answer:

I'm pretty sure the answer is 8.96

Step-by-step explanation:

1.28×7=8.96

8 0
3 years ago
If y= 1/2x and x= -14, find y
malfutka [58]

Answer:

y=-1/28

Step-by-step explanation:

y=1/2(-14)

y=1/-28

8 0
3 years ago
How to find the area of this figure
stiv31 [10]

Answer:

45 square units.

Step-by-step explanation:

Applying the pythagoras theorem:

Base of the bigger triangle = \sqrt{15^2 - 9^2} = \sqrt{144} = 12 units

Area of a triangle is given by \frac{1}{2} × base × height

The area of the bigger triangle is  \frac{1}{2} × 12 × 9 = 54 square units.

The area of the smallest triangle is  \frac{1}{2} × (12 - 10) × 9 = 9 square units.

The area of the figure( required triangle) is 54 - 9 = 45 square units.

3 0
3 years ago
- 7.5 divided by - 2.5
amm1812
-7.5 / -2.5 = 3

------------
8 0
3 years ago
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