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Kobotan [32]
4 years ago
12

M(x) = 4x + 15; m(x) = 7

Mathematics
1 answer:
stealth61 [152]4 years ago
7 0

Hi there! :)

\huge\boxed{x = -2}

m(x) = 4x + 15

Find the value of "x" that would satisfy m(x) = 7:

4x + 15 = 7

Subtract 15 from both sides:

4x = -8

Divide both sides by 4:

x = -2.

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Which inequality is equivalent to -6x ≥ 30?
liq [111]
Hey there!

Our goal here is to isolate the variable, x. In order to do this following the dividing and algebraic property of equality (which states that the equation remains equal if you do the same thing to both sides) , we must divide both sides by the coefficient of x, -6. That gives us: 

-6x/-6 ≥ 30/-6

Now, normally, we'd just complete this division - and we'd have our answer. But according to the rules of inequalities, when you multiply or divide by a negative number, the sign flips.<span>
</span>
Thus, our answer is:

x ≤ - 5, or D.

Hope this helps!
8 0
3 years ago
Find the percent of change in the perimeter.
WINSTONCH [101]

Answer:

-30%

Step-by-step explanation:

currently, the perimeter is: 4 + 6 + 4 + 6 = 20 in.

when the width of 4 in is decreased by 3 in, the new width become (4-3) in = 1 in

therefore, the new perimeter is: 1 + 6 + 1 + 6 = 14 in

the change in perimeter is: 20 in - 14 in = 6 in

now, the percent of change in perimeter will be:

\frac{change- in -perimeter}{original -perimeter} *100 = \frac{6}{20}*100 = 30%

BUT because this change is a DECREASE, you have to put a NEGATIVE sign before the value to inducate that it's a decrease, so

change in perimeter = -30%

7 0
3 years ago
Pick the expression that matches this description:
Katen [24]

Option C is correct because it is a trinomial with a leading coefficient of 3 and a constant term of -5

Step-by-step explanation:

We need to pick the expression that matches this description:

A trinomial with a leading coefficient of 3 and a constant term of -5

First lets explain the terms:

Trinomial: a polynomial having 3 terms

Leading coefficient: The constant value of variable having highest power

Constant term: Having no variable and value cannot be changed.

Now using these definitions, we can choose the correct option

Option A is incorrect because the expression has 2 terms

Option B is incorrect because it is a trinomial but the leading coefficient is -5 and not 3 constant term is 3 and not -5.

Option C is correct because it is a trinomial with a leading coefficient of 3 and a constant term of -5

Option D is incorrect because it is a trinomial but the leading coefficient is 3 but constant term is 1 and not -5.

So, Option C is correct.

Keywords: Algebra

Learn more about Algebra at:

  • brainly.com/question/12700460
  • brainly.com/question/4934417

#learnwithBrainly

6 0
3 years ago
Find the value of each variable.
Gre4nikov [31]

Answer:

21

Step-by-step explanation:

3 0
3 years ago
Help me with #20, please
eduard
In the flour row it is 4.5 and in the sugar row it is 18. Hope this helps :)
3 0
3 years ago
Read 2 more answers
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