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Murrr4er [49]
4 years ago
15

Which expression is equivalent to 64 − 9x2?

Mathematics
2 answers:
Cloud [144]4 years ago
7 0
(8)2-(3x)2 is the correct formula
soldi70 [24.7K]4 years ago
6 0

Answer:

The equivalent Expression is ( 8 - 3x )( 8 + 3x )

Step-by-step explanation:

Given : Expression = 64-9x^2

To find: An Equivalent expression to given expression

We find equivalent Expression by simplifying the given expression

Consider,

64-9x^2

\implies 8^2 - (3x)^2

by using an identity, a^2-b^2=(a-b)(a+b) . we get,

\implies (8-3x)(8+3x)

Therefore, The equivalent Expression is ( 8 - 3x )( 8 + 3x )

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X/2.7 = 1.09 <br> FIND THE MEANING OF x
Kazeer [188]

Answer:

2.943

Step-by-step explanation:

2.943/2.7=1.09

6 0
4 years ago
Please help! i cant solve it​
3241004551 [841]

a ≈ 5.2, B ≈ 50°, C ≈ 95°

Solution:

Given data:

A = 35°, b = 7, c = 9

Using cosine law,

a^{2}=b^{2}+c^{2}-2 b c \cos A

a^{2}=7^{2}+9^{2}-2 (7)(9) \cos 35^\circ

a^{2}=49+81-126 (0.82)

a^{2}=26.68

Taking square root on both sides.

a ≈ 5.2

Using sine law,

$\frac{\sin A}{a} =\frac{\sin B}{b}

$\frac{\sin 35^\circ}{5.2} =\frac{\sin B}{7}

Multiply by 7 on both sides.

$\frac{0.5735}{5.2}\times 7 =\sin B

Switch the sides.

Sin B = 0.772

B=\sin^{-1}0.772

B ≈ 50°

Sum of all the angles of a triangle = 180°

A + B + C = 180°

35° + 50° + C = 180°

85° + C = 180°

C = 180° - 85°

C = 95°

Hence a ≈ 5.2, B ≈ 50°, C ≈ 95°.

4 0
3 years ago
Origami is the Japanese art of paper folding. The diagram below represents an unfolded paper kabuto, a samurai warriors helmet.
sasho [114]

Answer:

A, C, and D  

Step-by-step explanation:

A. QRC and QRO

C. IRS and MRS

D. CRU and IRU

3 0
3 years ago
What precent is 45 of 125 can anyone help me please
qwelly [4]
<span>45 is 36% of 125
</span>
Hope this helps!

6 0
3 years ago
a bottle of tomato juice contains 247.5 mg of vitamin C and has 5.5 servings. A bottle of grape juice contains 258 mg of vitamin
wolverine [178]
Tomato juice 237.5 / 5.5 = 45 mg
Grape juice 258 / 3 = 86 mg
5 0
3 years ago
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