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2 years ago

What is 3x + 10x =65?

Mathematics

2 answers:

zhannawk [14.2K]2 years ago

6 0

Answer:

x = 5

Step-by-step explanation:

3x + 10x =65

13x = 65

/13 /13

------------------

x = 5

kiruha [24]2 years ago

4 0

Answer:

x = 5

Step-by-step explanation:

add both x values --> 13x

divide both sides by 13 ---> 5

so, x = 5

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miskamm [114]

sin²x + cos²x = 1
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3 years ago

Ian can buy bottles of water in packages of 6 for $9.24 or in packages of 4 for $8.80. How much money does he save by buying 12

kati45 [8]

Answer:

Ian saves 7.92

Step-by-step explanation:

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3 years ago

If AC=5cm, BC=12cm, and m AC= 40 degrees what is the radius of the circumscribed circle

melamori03 [73]

Let's assume they meant C=40 degrees. With an angle like that they're asking for approximation; we'll oblige.

The circumradius is the product of the triangle sides divided by four times the area.

Here we have remaining side given by the Law of Cosines.

$AB^2 = AC^2 + BC^2 - 2\ AC \ BC \cos C$

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$AB = \sqrt{ 169 - 120 \cos 40 ^\circ} \approx 8.77921789$

The area is $\frac 1 2\ AC \ BC \sin C = \frac 1 2 (5)(12) \sin 40^\circ \approx 19.283628$

The circumradius is $r \approx \dfrac{(5)(12)(8.77921789 )}{ 4 (19.283628) } = 6.829019329$

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3 years ago

Which is a graph of y=-1/2x- 2?

cricket20 [7]

Answer:

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Step-by-step explanation:

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