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3 years ago

HURRY THIS IS 60 POINTS PLEASE HELP NOW

Mathematics

2 answers:

Paul [167]3 years ago

7 0

Answer:

252 $cm^{2}$

Step-by-step explanation:

To find the area of a trapezoid, you must add both the bases up then divide by two. After that you must multiply that by the height.

$\frac{a+b}{2} h$ here is the formula where a and b are the bases.

$\frac{20+16}{2} * 7$

Simplify.

$\frac{36}{2} * 7\\\\18*7\\= 126$

That is the area of one trapezoid and since there are two of the same trapezoids, you must multiply by two.

$126 * 2 = 252$

Therefore your answer is 252 cm^2.

Elenna [48]3 years ago

3 0

Answer:

252 cm²

Step-by-step explanation:

2[½ × (20 + 16) × 7]

36 × 7

252

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Step-by-step explanation:

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Suy ra BH = AH.tanA = 12,9.tan61°=23,37

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2 years ago

Evaluate (c − b)2 + a2 for a = –5, b = –2, and c = –4.

frosja888 [35]

Answer:

Step-by-step explanation:

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2 years ago

What is the equation, in point-slope form, for a line that goes through (8,- 4) and has a slope of -5/6

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Answer:

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Step-by-step explanation:

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I am joyous to assist you anytime.

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2 years ago

<img src="https://tex.z-dn.net/?f=%5Cleft%20%5C%7B%20%7B%7Ba%5E2%20-2a-b%5E2%3D0%7D%20%5Catop%20%7B2b%2B2ab%3D0%7D%7D%20%5Cright

oksian1 [2.3K]

Given :-

a² - 2a - b² = 0
2b + 2ab = 0

To find :-

Value of a and b .

Solution :-

Taking second equation:-

2b + 2ab = 0
2b ( 1 + a ) = 0
2b = 0 or (1+a) = 0
b = 0 , a = -1

Substitute in first equation :-

a² - 2a - b² = 0

When b = 0 ,

a² - 2a - 0² = 0
a² - a = 0
a( a -1) =0
a = 0 , 1

When a = -1 ,

(-1)² - 2*(-1) - b² = 0
1 + 2 - b² = 0
b² = 3
b = ±√3

Answer :-

a = 0,1 ; b = 0
a = -1 , b = ±√3

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2 years ago