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Dmitry [639]
3 years ago
6

What is the value of the expression 99 – 7a2 when a a = 3?

Mathematics
1 answer:
77julia77 [94]3 years ago
7 0

Answer:

36

Step-by-step explanation:

plug in a=3 for a

I belive you meant 99- 7 * a^2

so 99- 7 * (3)^2 = 36

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Find the product of two numbers before multiplying by the next number. 25 × 3 × 2​
Varvara68 [4.7K]

Answer and explanation:

25 x 3 = 75

75 x 2 = 150

I found the product of the first two numbers, then multiplied the third.

The answer is 150. Hope this helps!

5 0
4 years ago
Priya is stacking building blocks to make a tower. She takes a break when the tower is feet tall, which is of the height of the
garik1379 [7]

Complete question :

Priya is stacking building blocks to make a tower. She takes a break when the tower is 2 and 1/2 feet tall, which is 5/8 of the height of the tower she wants to build. How tall is the tower when finished

Answer:

4 feets

Step-by-step explanation:

Given that:

Height of building when she took a break = 2 1/2 feets

Let the entire height of the tower = x

2 1/2 feets = 5/8 of the tower height

2 1/2 feets = (5/8)x

Height of tower when finished ; fins the value of x

5/2 = 5x / 8

Cross multiply

5*8 = 2*5x

40 = 10x

Divide both sides by 10

40/10 = 10x/ 10

4 = x

Hence, height of tower when completed is 4 feets

5 0
3 years ago
TEST ITEMS
arlik [135]

Answer:

40 cm by 44 cm

Step-by-step explanation:

A square sheet of paper has area 1600 cm^2.

area = s^2

1600 cm^2 = s^2

s = sqrt(1600 cm^2)

s = 40 cm

The side of the square was 40 cm, so the square measured 40 cm by 40 cm.

One side of 4 cm short, so the paper should have been 40 cm by 44 cm.

3 0
4 years ago
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