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3 years ago

Solve the system of equations -7x - 6y = 4 x= -3y + 8

1 answer:

7 0

You can use the substitution method for this problem
Since -3y+8=x you can
Use the equation -7(-3y+8) -6y=4
You then distribute and solve
21y-56-6y=4
15y=60
Y=4
You then plug y into one of the original equations
X=-12+8
X=-4
(-4,4)

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Find the equation of a line that contains the points (6,3) and (6,−2).

RSB [31]

Answer:

x = 6

Step-by-step explanation:

First find the gradient,

$Gradient = \frac{y2-y1}{x2-x1} = \frac{-2-3}{6-6} =\frac{-5}{0} =0$

Since this line has no gradient, it means that it's a horizontal or vertical line. We cannot substitute in the values because the gradient is 0 so this line will only be x = 6

3 0

3 years ago

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ADD is to MULTIPLY as SUBTRACT is to what

Rzqust [24]

Divide! If you add three and four, you get seven. Subtracting four from seven, you get three. If you multiply three and four, you get twelve. If you then divide by four, you get back to 3. I hope this helped!

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3 years ago

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What is the smallest of 3 consecutive positive integers if the product of the smaller two integers is 5 less than 5 t imes the l

givi [52]

The answer is x= 5
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3 years ago

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Juan and Nina are in the Junior High Orchestra. As part of the orchestra they each have to learn two instruments. Juan is learni

Whitepunk [10]

Answer:

Nina practiced the viola for 11.25 hours last week.

Step-by-step explanation:

Juan practiced the violin for 9 hours last week. For each 3 hours that he practices the violin, he practices 2.5 hours of cello. So

3h violin - 2.5h cello

9h violin - xh cello

$3x = 9*2.5$

$x = 7.5$

He practiced 7.5 hours of cello, the same as Nina.

For every 3 hours Nina spends practicing the viola she practices the cello for 2 hours. So:

3h viola - 2h cello

xh viola - 7.5h cello

$2x = 3*7.5$

$x = 7.5*1.5$

$x = 11.25$

Nina practiced the viola for 11.25 hours last week.

3 0

3 years ago

Pls can some one help if you like

Snezhnost [94]

Slope is rise/run
gains 4m height for every 3secons
rise=4m
run=3sec
slope=4/3

if takes 54seconds t
54 times 4/3=72 meters

max height is 72 meteres assuming that it starts from the ground level

4 0

2 years ago