All categories

3 years ago

Please help and show work y=-8x y=-4-10x

1 answer:

Nutka1998 [239]3 years ago

7 0

{ y=-8x
{ y=-4-10x

Substitution Method:

-8x=-4-10x
x=-2

y=-8(-2)
y=16

(x,y) = (-2,16)

Check solution
{ 16=-8(-2)
{ 16=-4-10(-2)

{ 16=16
{ 16=16

Elimination Method:

{ 8x+y=0
{ 10x-y=-4

{ 8x+y=0
{ -10x-y=4

-2x=4
x=-2

8(-2)+y=0
y=16

(x,y) = (-2,16)

*For checking, its the same with the substitution method

You might be interested in

A scatterplot is produced to compare the size of a lake to the number of fish that are in it. There are 15 data points, each rep

alukav5142 [94]

Answer:

Since there is no cluster formed in the scatterplot, the two variables are not related. Therefore, based on the data shown in the scatterplot, the number of fish in a lake is not dependent on the size of the lake.

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Simplify the expression so there is only one positive power for each base.

katen-ka-za [31]

Answer:

Option (A)

Step-by-step explanation:

The given expression is,

$(5^{-2}\times 4^{-4})^{-2}$

Since $x^{-1}=\frac{1}{x}$ and $\frac{1}{x^{-1}}=x$

$5^{2}=\frac{1}{5^{-2}}$

$4^{2}=\frac{1}{4^{-2}}$

Therefore, $(5^{-2}\times 4^{-4})^{-2}=\frac{1}{(5^{-2}\times 4^{-4})^{2}}$

$=\frac{1}{(5^{-2})^2\times (4^{-4})^2}$

$=\frac{1}{5^{-4}\times 4^{-8}}$

$=\frac{1}{5^{-4}}\times \frac{1}{4^{-8}}$

$=5^{4}\times 4^{8}$

Option (A) will be the answer.

8 0

3 years ago

Angle x Is angle x is (2n + 12) and angle y is. 3(n+18 find the measure of angle x

Anastaziya [24]

I think your answer is 12, sorry if I’m wrong

8 0

3 years ago

Hello! can you guys help me with this one? 50 Points!!

HACTEHA [7]

Answer:

I believe it is A

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

How is a line of best fit drawn? Describe how you decide where to put it.

Gnoma [55]

Answer:

A line of best fit is a straight line going through a trend on a scatter plot.

Step-by-step explanation:

A well drawn line of best fit is just a line going straight through the trend of dots to approximate an exact trend from a non-exact plot, so just draw a line that stays in the middle of the dots and you should do great.

Hope this helped!

3 0

3 years ago