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3 years ago

WILL GIVE BRAINLIEST

Mathematics

1 answer:

Anika [276]3 years ago

7 0

Answer:

-2 reflects over the x-axis and expands vertically
-1 shifts downward 1 unit

Step-by-step explanation:

Since you have studied function transformations, you know that multiplying the y-value by -2 causes it to be reflected over the x-axis and expanded vertically by a factor of 2.

Similarly, you know that adding -1 to a y-value shifts its location on a graph downward by 1 unit. (y is the vertical position. y-1 will be 1 unit lower.)

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I need answer on this graphing va substitution.Problem 7 I tried to solve it but not sure that’s correct

Bond [772]

Given the system of equations:

$\begin{gathered} 2x+9y=27 \\ x-3y=-24 \end{gathered}$

To solve it by substitution, follow the steps below.

Step 1: Solve one linear equation for x in terms of y.

Let's choose the second equation. To solve it for x, add 3y to each side of the equations.

$\begin{gathered} x-3y=-24 \\ x-3y+3y=-24+3y \\ x=-24+3y \end{gathered}$

Step 2: Substitute the expression found for x in the first equation.

$\begin{gathered} 2x+9y=27 \\ 2\cdot(-24+3y)+9y=27 \\ -48+6y+9y=27 \\ -48+15y=27 \end{gathered}$

Step 3: Isolate y in the equation found in step 2.

To do it, first, add 48 to both sides.

$\begin{gathered} -48+15y=27 \\ -48+15y+48=27+48 \\ 15y=75 \end{gathered}$

Then, divide both sides by 15.

$\begin{gathered} \frac{15y}{15}=\frac{75}{15} \\ y=5 \end{gathered}$

Step 4: Substitute y by 5 in the relation found in step 1 to find x.

$\begin{gathered} x=-24+3y \\ x=-24+3\cdot5 \\ x=-24+15 \\ x=-9 \end{gathered}$

Answer:

x = -9

y = 5

or (-9, 5)

Also, you can graph the lines by choosing two points from each equation, according to the picture below.

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1 year ago

HELP PLS ILM GOVE EXTRA POINTS

Alex777 [14]

Answer:

I think it might be A or even C sorry if you get it wrong I don't remember what I answered to this test

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3 years ago

42.54 degrees is the same as 42 degrees______ '42"

pav-90 [236]

The answer is 24" hope this helps.

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3 years ago

Work the following pricing problems for services rendered. (Round to hundredths.) Hourly rate, worker A = $15.00 Hourly rate, wo

svlad2 [7]

Hello there :-)

Total cost of job=retail price of goods+labor cost+overhead

Labor cost
15×2.5+8×1+5.25×(3÷4)
=49.44 this is labor cost

Overhead= labor cost×overhead rate
Overhead=49.44×0.75=37.08

Now find total cost of job
Total cost of job=125.50+49.44+37.08
=212.02....answer

Hope it helps

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3 years ago

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DochEvi [55]

The answer is- b. explanation. it’s b

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