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2 years ago

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There are 48 students in a speech contest. Yesterday, 2/3 of them gave their speeches. Today, 3/4 of the remaining students gave

their speeches. How many students still haven't given their speeches?

1 answer:

Dmitry [639]2 years ago

8 0

Answer:

24 :))))))))))))))

Step-by-step explanation:

2/3 of 48 is 32, so 3/4 of 32 is 24.

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Given the triangle that has a base of five less than triple the height. The height is 2x+6.

Deffense [45]

Answer:

<h3> A = 0.5(2x+6)(6x+13) = 6x² + 49x + 78</h3>

Step-by-step explanation:

H = 2x+6 - the hight

3H = 3(2x+6) - triple the hight

3H-5 = 3(2x+6) - 5 - five less than triple the height

Area of triangle: A = 0.5BH

B = 3(2x+6)-5 = 6x + 18 - 5 = 6x + 13

H = 2x+6

So:

A = 0.5(2x+6)(6x+13) = (x+6)(6x+13) = 6x² + 13x + 36x + 78

A = 6x² + 49x + 78

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2 years ago

WXY is a right triangle. <br><br> A. True. <br> B. False.

lora16 [44]

Answer:

B. False

Step-by-step explanation:

According to pythagorean theorem, for this to be a right triangle, the sum of square of the length of the two legs must equal square of the length of the hypotenuse (longest side).

So $(\sqrt{34} )^{2}$ should equal $(\sqrt{18} )^{2}+(\sqrt{18} )^{2}$

<em>We also know that $(\sqrt{a} )^{2}=(\sqrt{a})(\sqrt{a})=a$ </em>

Hence, $(\sqrt{18} )^{2}+(\sqrt{18} )^{2}=18+18=36$ , and

$(\sqrt{34} )^{2}=34$

They ARE NOT EQUAL, so the triangle is NOT a right triangle.

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2 years ago

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What is the answer to -1 3/5 ÷ 5/-6 ???

Anna007 [38]

Thats what I got. I hope it helps :)

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2 years ago

What is the value of the expression 2[3(4^2+1)]-2^3?

puteri [66]

Answer: 94

Step-by-step explanation: use photo math :)

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2 years ago

Simplify the expression.<br> 11(32 + 5x) + 4x - x

alex41 [277]

Answer:

352+58x

Step-by-step explanation:

Distribute to get 352+55x+4x-x

Combine like terms to get 352+58x.

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2 years ago

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