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Darina [25.2K]
3 years ago
7

a school purchsed basketball for $20 each and footballs for $15 each. they a brought a total of 28 for $480 how many of each typ

e did they buy. define yur varaibles, write a system. solve the system. PLZZZ ANSWER I NEED IT FOR A TEST AND ITS TIME LIMIT
Mathematics
1 answer:
Contact [7]3 years ago
3 0

Answer:

13

Step-by-step explanation:

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Is (-4, 2) a solution of 4x + 5y < -7?
cupoosta [38]

Answer:

No

Step-by-step explanation:

Substitute the coordinates of the point into the left side of the inequality, evaluate and compare.

4(- 4) + 5(2) = - 16 + 10 = - 6 > - 7

Thus (- 4, 2 ) is not a solution

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The sun shines at a 30° angle to the ground. To the nearest inch, how long is the shadow cast by a 72-in. tall fence post?
tensa zangetsu [6.8K]

The length of the shadow is 124.7 in

<u>Explanation:</u>

<u />

Given:

Angle, θ = 30°

Height of the fence,  h = 72 in

Length of the shadow, l = ?

Given:

tan 30° = \frac{perpendicular}{base}  = \frac{height of the fence}{length of the shadow}

\frac{1}{\sqrt{3} } = \frac{72}{l} \\\\l = 72\sqrt{3} \\\\l = 124.7 in

Therefore, the length of the shadow is 124.7 in

5 0
3 years ago
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Maru [420]

Answer:

slope: 3 for N and 1/2 for O

Step-by-step explanation:

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Write the word sentence as an inequality. Then solve the inequality.
ss7ja [257]

Answer:

x/7<-3

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Step-by-step explanation:

x/7<-3

multiply the seven to get rid of x denominator

x<-21

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