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4 years ago

(2r-2)(-r-7) please help me figure this out. I need your help

Mathematics

1 answer:

tia_tia [17]4 years ago

8 0

Using the foil method you get:

(2r*r) + (2r*-7) + (r*-2) + (-2*-7)

which is simplified to

2r^2 -16r + 14

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Help me solve this problem 12.

photoshop1234 [79]

the midpoint is (-3,2)

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4 years ago

Find the value of x: 3(6x - 4x) = -30<br> (Provide Step-By-Step)

Olegator [25]

Answer:

x = -5

Step-by-step explanation:

Multiply 3 by (6x - 4x) = 18x - 12x

18x - 12x = -30

6x = -30

x = -30 /6

x = -5

5 0

3 years ago

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Given the function: f(x) = 2x3 - 3/2x, find f(-4).

Sergeu [11.5K]

Answer:

D) -122

Step-by-step explanation:

Given:

$f(x) = 2x^3-\frac{3}2x$

We need to find f(-4).

Now by substituting the value of x =-4 in above equation we get;

$f(-4)= 2\times(-4)^3-\frac{3}{2}\times(-4)\\$

By using PEDMAS we will solve for exponential function first we get;

Now we know that $(-4)^3=-64$

So we get;

$f(-4)= 2\times(-64)-\frac{3}{2}\times(-4)\\$

Now using PEDMAS we will solve division.

$f(-4)= 2\times(-64)-1.5\times(-4)$

Now using PEDMAS we solve multiplication.

$f(-4)= -128+6$

Finally by subtraction we get;

$f(-4)= -122$

5 0

3 years ago

Convert 34.0 dm to km. Show all work.

larisa [96]

Step-by-step explanation:

Convert 34 Decimeters to Kilometers (dm to km) with our conversion calculator and conversion tables. To convert 34 dm to km use direct conversion formula below.

34 dm = 0.0034 km.

You also can convert 34 Decimeters to other Length (popular) units.

6 0

3 years ago

Read 2 more answers

What is 5/2 - blank = 1/3

sdas [7]

Step-by-step explanation:

taking that blank as x

5/2 -x = 1/3

the x will go to the right hand side of the equation which then would make it positive ( making x the subject) and 1/3 will come to the left hand side of the equation becoming -1/3

so the equation will become 5/2-1/3=x

solving the fraction then gives 13/6 or 2.17 as the value of x

7 0

3 years ago