All categories

3 years ago

What are the steps to answer -3(2r+7)=3

2 answers:

7 0

You times -3 by 2r and get -6r and then times -3 by 7 and get 21

-6r -21=3
subtract-21 from 3 and you’ll get -18 and divide -18 and -6r and you get R= -3

kumpel [21]3 years ago

3 0

-3(2r+7)=3
distribute -3
-6r-21=3
add 21 to both sides, this causes the 21 on the left to cancel itself out.
-6r=24
divide each side by -6, this causes the -6 on the left side to cancel itself out.
r=-4

You might be interested in

(Problem in two-dimensions.) Given the line: L1 : y = 2x , (2) find the equation of the line L2 perpendicular to L1 passing thro

kirill115 [55]

Given :

Equation of line 1 , y = 2x .

A point (1 , 2) .

To Find :

The equation of the line L2 perpendicular to L1 passing through the point P = (1, 2) .

Solution :

Let , equation of line 2 is :

y = mx + c .....eq 1 ( here , m is slope and c is a constant )

Now , we know when two lines are perpendicular product of their slope is -1 .

Slope of given line is 2 .

Therefore ,

$2m=-1\\\\m=\dfrac{-1}{2}$

Now putting value of m in equation 1 , we get :

$y=\dfrac{-1}{2}x+c$

Now , it is given that this point (1,2) satisfy the above equation .

So ,

$2=\dfrac{-1}{2}(1)+c\\\\c=\dfrac{5}{2}$

Putting value of c in above equation , we get :

$y=-\dfrac{1}{2}x+\dfrac{5}{2}\\\\2y=-x+5$

Therefore , the equation of the line L2 perpendicular to L1 passing through the point P = (1, 2) is 2y = -x +5 .

Hence , this is the required solution.

7 0

3 years ago

Given that

zloy xaker [14]

g(x) = f(x) + 9 shifts it up 9 units.

g(x) = f(x+2) shifts it left 2 units.

g(x) = -f(x) reflects it across the x-axis.

It looks like you may want

... g(x) = -(f(x+2) +9) . . . . . shifted up, then reflected

$g(x)=-\left(5^{(x+2)}+9\right)$

4 0

3 years ago

Image is attached. Please help, will mark brainliest. :)

love history [14]

Answer:

208 feet

Step-by-step explanation:

We have to multiply 4x4 to get 16, and since there looks like there are 5 small squares we multiply 5x16 to get 80. And then there are 2 bigger squares that are 8x8 to get 64, then we multiply by 2 to get 128, then we add 80 (the sum of the 5 smaller squares) to get to a total of 208.

4 0

3 years ago

A publisher needs to send many books to a local book retailer and will send the books in a combination of small and large boxes.

mote1985 [20]

Answer:

5 large boxes

3 small boxes

Step-by-step explanation:

Create two equations to represent the problem.

let "a" be the number of small boxes

let "b" be the number of large boxes

20a + 40b = 260 This equation shows the numbers of books

a + b = 8 This equations shows the number of boxes

Solve the system of equations (solve for a and b). We can solve using the substitution method.

Rearrange a + b = 8 to isolate one of the variables.

a = 8 - b New equation that represents "a"

Since we know an equation for "a", we can substitute what "a" equals into the other equation. There will only be one variable in the equation, so we can solve by isolating. Isolate by doing reverse operations.

Substitute "a" for 8 - b

20a + 40b = 260

20(8 - b) + 40b = 260 Distribute 20 over the brackets by multiplying

160 - 20b + 40b = 260 Collect like terms (numbers with same variables)

160 + 20b = 260 Start isolating "b". Subtract 160 from both sides

20b = 260 - 160

20b = 100 Divide both sides by 20

b = 5 Number of large boxes

Substitute "b" for 5 in the simplest equation

a + b = 8

a + 5 = 8 Subtract 5 from both sides to isolate "a"

a = 8 - 5

a = 3 Number of small boxes

Therefore there were 5 large boxes and 3 small boxes sent.

3 0

2 years ago

A mechanic has a set fee for working on someone's automobile and charges by the hour for making repairs. The total cost of her s

julia-pushkina [17]

I think it’s either b or c. But I’m leaning more towards c

7 0

2 years ago