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Anestetic [448]
2 years ago
8

a stack of bricks is 3 1/2 feet high. if each brick is 1 3/4 inches high, how many bricks are in the stack?

Mathematics
1 answer:
Pepsi [2]2 years ago
6 0
The number of bricks= Total height of stack/ height of a single brick.
No. of bricks=3 1/2 ÷ 1 3/4
Convert the fractions into improper fractions;
No. of bricks= 7/2÷7/4
No. of bricks= \frac{14}{4} * \frac{4}{7}
No. of bricks= 2
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dezoksy [38]

Answer:

B

Step-by-step explanation:

6*3=18+4=22  6*5=30+4=3

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3 years ago
Question 72 true or false
nalin [4]

Answer:

True

m∠T = 40.4°

Step-by-step explanation:

We know all the sides of the triangle but we do not know any of its angles.

To find out if the angle T = 40.4 ° we use the cosine theorem.

According to the cosine theorem:

c^2=a^2 +b^2-2abcos(\alpha)

Where \alpha is the angle between a and b.

In this case:

\alpha = T\\\\a= 11\\\\b=13\\\\c= 8.5

Then we clear α from the formula and verify that it is equal to 40.4 °

8.5^2 =11^2 + 13^2 -2(11)(13)cos(\alpha)\\\\8.5^2 -11^2 - 13^2= -2(11)(13)cos(\alpha)\\\\-8.5^2 +11^2 + 13^2= 2(11)(13)cos(\alpha)\\\\\frac{-8.5^2 +11^2 + 13^2}{2(11)(13)}=cos(\alpha)\\\\\alpha=arcos(\frac{-8.5^2 +11^2 + 13^2}{2(11)(13)})\\\\\alpha = 40.4\° =T

6 0
3 years ago
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Amanda [17]

Answer:

3.141

Step-by-step explanation:

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7 0
2 years ago
Read 2 more answers
What’s the measure of angle F?
Naily [24]

Answer:

F = 105

Step-by-step explanation:

The  sum of the interior angles of a polygon with n sides is (n – 2)180.

This polygon  has 6 sides so the sum of the interior angles is (6-2) * 180 =

720

Add up the angles

x-60 +x-40 +130 +120 +110 + x-20 +x-20 = 720

Combine like terms

4x +220 = 720

Subtract 220 from each side

4x+220-220 = 720-220

x = 500

Divide each side by 4

4x/4=500/4

x = 125

We want to find angle F

F = x-20

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3 0
3 years ago
Please help, I’ll mark you as brainliest!!!!
Rainbow [258]

Answer:

80%

Step-by-step explanation:

Percent increase is calculated as

\frac{increase}{original} × 100%

Increase = $27 - $15 = $12 , then

percent increase = \frac{12}{15} × 100% = 0.8 × 100% = 80%

5 0
2 years ago
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