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2 years ago

8 less than 1/3 a number n is -13

1 answer:

7 0

Let's set up an equation.

so we know the answer is -13.
1/3 of a number (our variable) can be written as 1/3n.
8 less than that would be subtracting 1/3n by 8

so we have -13 = 1/3n - 8.

To solve:
Add 8 to both sides: -5 = 1/3n
Multiply both sides by 3 (to cancel fraction): -15 = n

You can check by plugging -15 into the equation we made.

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I'm getting two different answers while I'm helping my lil sister out, could anybody help? It's

GREYUIT [131]

3 2/3 For #1
2.5 for #2
4.125 for #3

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3 years ago

What is the slope y- intercept of 3x+6y=-15

il63 [147K]

Answer:

Slope: $-\frac{1}{2}$

Y-Intercept: $-\frac{5}{2}$

Step-by-step explanation:

~Hope this helps .^.~

3 0

2 years ago

−7=y7 please help me out

Yuri [45]

Answer:

Step-by-step explanation:

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2 years ago

Read 2 more answers

Calculate the length b to two decimal places.

Andrej [43]

Answer:

B. 21.64

Step-by-step explanation:

We have been given a triangle and we are asked to find the length of AC (b).

We will use law of cosines to find the length of side AC.

$c^{2}=a^{2}+b^{2}-2ab \text{ cos }\theta$

Upon substituting our given values in the formula we will get,

$(AC)^{2}=15^{2}+12^{2}-2\times 15\times 12 \text{ cos}(106)$

$(AC)^{2}=225+144-360\text{ cos}(106)$

$(AC)^{2}=369-360(-0.275637355817)$

$(AC)^{2}=369+99.22944809412$

$(AC)^{2}=468.22944809412$

Upon taking square root of both sides of our equation we will be get,

$AC=\sqrt{468.22944809412}$

$AC=21.6386101238993629\approx 21.64$

Therefore, the length of b is 21.64 and option B is the correct choice.

6 0

3 years ago

Find the 7th term of the geometric sequence -5, 15, 45, 135, 405,...

katovenus [111]

Answer:

1,215

Step-by-step explanation:

Because if you think of it it multiplies by 3x so 3x5=? 15! 15x3=? 45! 45x3=? 405! 405x=3? 1,215! 1,215x3=? 3,645! anyways, I can go on and on I hope this answer was right!

7 0

3 years ago