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3 years ago

7th grade math help me please:)

Mathematics

2 answers:

Rus_ich [418]3 years ago

4 0

Answer:

????????????

Step-by-step explanation:

navik [9.2K]3 years ago

3 0

Answer:question A i am confused on.

Step-by-step explanation:

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just olya [345]

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3 years ago

One of the diagonals of a rhombus of perimeter 120m is 36m. Find its area and the length of the other diagonal. pls answer fastt

mash [69]

Answer: $864\ m^2,\ 24\ m$

Step-by-step explanation:

Given

Perimeter of the rhombus is $120\ m$

Length of one of the diagonal is $d_1=36\ m$

All the sides of the rhombus are equal

$\Rightarrow 4a=120\\\Rightarrow a=30\ m$

Area of the rhombus with side and one diagonal is

$\Rightarrow \text{Area=}\dfrac{1}{2}d\sqrt{4a^2-d^2}$

Insert the values

$\Rightarrow \text{Area=}\dfrac{1}{2}\times 36\times \sqrt{4\cdot 30^2-36^2}\\\\\Rightarrow \text{Area= }18\sqrt{3600-1296}\\\Rightarrow \text{Area= }18\times 48\\\Rightarrow \text{Area= }864\ m^2$

Area with two diagonals length can be given by

$\Rightarrow \text{Area =}0.5\times d_1\times d_2 \\\text{Insert the values}\\\Rightarrow 864=36\times d_2\\\Rightarrow d_2=24\ m$

Thus, the area of the rhombus is $864\ m^2$ and the length of the other diagonal is $24\ m$

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3 years ago

Find the surface area and volume of the figure. Round to the nearest tenth.

Debora [2.8K]

Answer: 84 mm is MAYBE the answer.

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3 years ago

How do you do this algerbra problem 2/3x-8=9

Zigmanuir [339]

Write the division as a fraction
2/3x - 8 = 9
Multiply both sides of the equation by 3
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Move the constant to the right and change the sign
2x=27+24
Add the numbers
2x=51
Divide both sides by 2
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X= 25.5

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