X=-10 and Y-5, then 3x+6y=

Mathematics

2 answers:

oksian1 [2.3K]3 years ago

8 0

Answer:

-60

Step-by-step explanation:

Substitute -10 and -5 for x and y in the equation:

3x + 6y = 3(-10) + 6(-5) = -30 + -30 = -60

valkas [14]3 years ago

8 0

Answer:

-60

Step-by-step explanation:

-10(3)= -30

-5(6)= -30

-30+(-30)=-60

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The average weight of 10 boys is 77.0 pounds. If the

n200080 [17]

Answer:

68 pounds.

Step-by-step explanation:

Find the total weight when there are 10 boys and when there are 9 boys then calculate the difference.

I'll let x = total weight.

$\frac{x}{10}=77\\(10)\frac{x}{10}=77(10)\\x=770\\\\ \frac{x}{9}=78\\(9)\frac{x}{9}=78(9)\\x=702\\\\ 770-702=68$

Therefore, the youngest boy weighs 68 pounds.

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3 years ago

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soldier1979 [14.2K]

Since all the option shows the variation is direct..

I. E y=kx let's take the first one to find the k and as well the relationship
When y=24,x=20

24=k*20

K=24/20

k=6/5
K=1.2....

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3 years ago

A restaurant bill before tax is $15.50. how much is a 15% tip for this bill?

Oksanka [162]

15.50 times .15 is $2.33

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4 years ago

Read 2 more answers

How do you find out if a like is parallel, perpendicular, or coincidental when theres 2 equations

finlep [7]

The slope intercept form of the equation of a line is given as:

y = mx + c

where m = the slope of the line

c = the y - intercept of the line

1) Two line are parallel if they have the same slope

That is:

$\begin{gathered} \text{If the equation for line 1 is: y = m}_1x+c_1 \\ \text{If the equation for line 2 is: y = m}_2x+c_2 \\ \text{Then, line 1 is parallel to line 2 if m}_1=m_2 \end{gathered}$

2) Two equations are perpendicular if the slope of one is the negative inverse of the other.