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Feliz [49]
3 years ago
15

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.

4 0
3 years ago
Please hurry :) fast
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....
5 0
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
6 0
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.

\text{That is : m}_1=\text{ }\frac{-1}{m_2}

3) Two equations are coincidental if they have the same slope and the same y intercept

\begin{gathered} \text{That is: m}_1=m_2_{} \\ \text{and c}_1=c_2 \end{gathered}

8 0
1 year ago
Please help with khan!
frez [133]

Answer:

B

Step-by-step explanation:

n+12=18.3

  -12    -12

n=6.3

He subtracted incorrectly and got 5.7 as an answer instead of 6.3

-hope it helps

4 0
3 years ago
Read 2 more answers
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