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3 years ago

7(3r - 1) - (r + 5) = -52 Please step by step help

Mathematics

2 answers:

dmitriy555 [2]3 years ago

7 0

Answer:

r = -2

Step-by-step explanation:

7(3r - 1) - (r + 5) = -52 distribute (the - sign too)

21r - 7 + -r - 5 = -52 add/ subtract like terms

20r - 12 = -52 subtract -12 and added to -52

+12 +12

20r = -40 divide by 20

20r/20 = -40/20

r = -2

MrMuchimi3 years ago

4 0

7(3r-1)-(r+5)=-52

21r-7-r-5=-52

21r-r-5-7=-52

20r-12=-52

Add 12 to both sides

20r=-40

Divide by 20

r=-2

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Simplify the expression -3 ÷ (-2/5

Harlamova29_29 [7]

Answer:

7.5

Step-by-step explanation:

To solve this expression, we can use PEMDAS or order of operations.

Parenthesis

Exponents

Multiplication>Division (Depends on which comes first from left to right)

Addition>Subtraction (See Multiplication>Division)

So First, lets solve the Parenthesis. -2/5=-.4

So now, our equation is -3/-.4

There is no exponents or multiplication, so lets just Divide.

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Hope this helps!

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2 years ago

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devlian [24]

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Step-by-step explanation:

For example if you have 4÷ 1/2. It basically means how many 1/2 can one get in 4. And the answers is 8.

Therefore multiplying by the reciprocal of a fraction when completing a division problem is a short cut method that has been tested and proven to be correct.

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3 years ago

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stira [4]

Answer:

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Step-by-step explanation:

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2 years ago

The function. In the graph is f(x) =

Tanya [424]

Answer:

$x^3-2x^2-5x+6$

Step-by-step explanation:

We have been given a graph of the function f(x).

Now we need to use that graph to find the equation of the graph and match with the correct choice from the give choices:

$x^4-2x^2+5x+6$

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Available degrees are 3 and 4. Degree 3 is odd so it is choice B or C.

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3 years ago

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Dmitry [639]

Answer:

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Step-by-step explanation:

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80 ÷ 20 = 4

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160 ÷ 40 = 4

They all equal 4 so that is the constant rate.

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