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3 years ago

3x(x−2), when x=7

Mathematics

2 answers:

gtnhenbr [62]3 years ago

7 0

Answer:

105

Step-by-step explanation:

subbing x for 7:

3*7(7-2)=21*5=105

raketka [301]3 years ago

3 0

105 right? because 3(7)((7)-2) 21(5) =105

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Area of the Shaded Region rectangle within reactanlge

Alik [6]

Answer:

132

Step-by-step explanation:

First you need to find the area of both regions (shaded and not shaded)

To find the shaded regions area multiply length by width

20 x 8 = 160

Then find the area of the unshaded region

7 x 4 = 28

Finally subtract the unshaded region from the shaded region

160 - 28 = 132

7 0

3 years ago

What is the factored form of 125x6 – 8?

NeTakaya

Answer:

Step-by-step explanation:

125 = 5 *5 * 5 = 5³

8 = 2 * 2 *2 = 2³

125x⁶ - 8 = 5³(x²)³ - 2³

= (5x²)³ - 2³ { a³ - b³ = (a -b)(a² + ab + b²)

= (5x² - 2) ([5x²]² + 5x²*2 + 2²)

= (5x² - 2)(25x⁴ + 10x² + 4)

Hint: (5x²)² = 5² * (x²)² = 25* x²ˣ² = 25x⁴

3 0

3 years ago

If rectangle A has a length and width that are z times the length and width of rectangle B, which of the following is true?

coldgirl [10]

The answer is A the perimeter of rectangle A is z times the perimeter of rectangle B

6 0

3 years ago

Please answer thank you

Alchen [17]

-x - 9 $\geq 5$

You want to get x by itself.

First subtract 9 from both sides of the equation.

-x - 9 $\geq 5$
+9 +9

-x $\geq 14$

Then divide -1 on both sides.

-x/-1 $\geq 14/-1$

I'm pretty sure when you divide a negative number when solving inequalities, you switch the sign.

x $\leq 5$

8 0

2 years ago

A number x divided by -1 is at least -4

Vinil7 [7]

A number x divided by -1 is at least -4.

x / -1 ≥ -4

Multiply both sides by -1.

x ≤ 4

Remember, when multiplying or dividing by a negative, you must change the sign's direction.

~Hope I helped!~

7 0

2 years ago