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3 years ago

What’s the answer! Need help with this ASAP please

Mathematics

1 answer:

Soloha48 [4]3 years ago

3 0

Answer:

4 41 students study both chemistry and physics at random

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What is the first step needed to solve

Mama L [17]

Do u have a pic of the problem?

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2 years ago

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The length of each side of an equilateral triangle is increased by 20%, resulting in triangle ABC. If the length of each side of

kompoz [17]

Answer: Area of ΔABC is 2.25x the area of ΔDEF.

Step-by-step explanation: Because equilateral triangle has 3 equal sides, area is calculated as

$A=\frac{\sqrt{3} }{4} a^{2}$

with a as side of the triangle.

Triangle ABC is 20% bigger than the original, which means its side (a₁) measures, compared to the original:

a₁ = 1.2a

Then, its area is

$A_{1}=\frac{\sqrt{3} }{4}(1.2a)^{2}$

$A_{1}=\frac{\sqrt{3} }{4}1.44a^{2}$

Triangle DEF is 20% smaller than the original, which means its side is:

a₂ = 0.8a

So, area is

$A_{2}=\frac{\sqrt{3} }{4} (0.8a)^{2}$

$A_{2}=\frac{\sqrt{3} }{4} 0.64a^{2}$

Now, comparing areas:

$\frac{A_{1}}{A_{2}}= (\frac{\sqrt{3}.1.44a^{2} }{4})(\frac{4}{\sqrt{3}.0.64a^{2} } )$

$\frac{A_{1}}{A_{2}} =$ 2.25

The area of ΔABC is 2.25x greater than the area of ΔDEF.

7 0

3 years ago

Use mental math to simplify the expression. (5 + 23) + 65

ohaa [14]

1. (5+23)+65 = (5+65)+23 = 70+23 = 93 (D)
2. -(4x-7) = -4X+7 (C)
3. 2(6X+9) = 12X+18 (B)
4. 5(X-3) = 35
X-3 = 35/5
X-3 = 7
SO X= 7+3 = 10

THEN NO
9 IS NOT A SOLUTION

8 0

3 years ago

3/4 - 2/7 = ? pls help me because I can get grounded

Leona [35]

Answer:

1/7

Step-by-step explanation:

&&5_4_&&&&&&&&&&&&&---

7 0

3 years ago

The length of a rectangular photograph is 7 inches more than the width. If the area is 78 square inches, what are the

Maurinko [17]

Answer:

width is 7.5

Length is 8

Step-by-step explanation:

because it is

4 0

3 years ago