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DerKrebs [107]
3 years ago
9

Simplify 7n - 1 - 9n + 5

Mathematics
1 answer:
Bumek [7]3 years ago
8 0

Answer: the answer is -2n + 4

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Susan wants to take her school picture that measures 4 inches by 6 inches and enlarge it to make a picture that measures 8 inche
Alex777 [14]

Answer:

dilation . i think

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Use a table to multiply (–5a)(2a – 1). A) –15a B) 5a2 + 10a C) –10a2 – 5a D) –10a2 + 5a
Varvara68 [4.7K]

Answer:

<h3>-10a² + 5a</h3>

Step-by-step explanation:

Given the expression (–5a)(2a – 1)

Open the bracket

(–5a)(2a – 1)

= -5a(2a) -5a(-1)

= -10a² + 5a

<em>hence the equivalent expression is -10a² + 5a</em>

8 0
3 years ago
Would it be A or B?
Katyanochek1 [597]
Try A
I think this is right 
Hope this helps you :)

6 0
3 years ago
The length of the rectangle is x cm. The length of a diagonal of the rectangle is 8 crn. The perimeter of the rectangle is 20 cm
klemol [59]

Answer:

x^2-10x+18=0

<em>a</em> = -10 and <em>b</em> = 18.

Step-by-step explanation:

Let <em>w</em> represent the width of the rectangle.

We are given that the perimeter of the rectangle is 20 cm, this means that:

20=2(x + w)

Let's put <em>w</em> in terms of <em>x</em>. Divide both sides by two:

10=x+w

And solve for <em>w:</em>

<em />w=10-x<em />

So, the rectangle measures <em>x</em> by (10 -<em> x</em>) cm.

<em />

According to the Pythagorean Theorem:

a^2+b^2=c^2

<em>a</em> and <em>b</em> are the legs and <em>c</em> is the hypotenuse.

Substitute <em>x</em> for <em>a, w</em> for <em>b</em>, and 8 for <em>c:</em>

<em />x^2+w^2=8^2<em />

Simplify and substitute:

x^2+(10-x)^2=64

Square:

x^2+(100-20x+x^2)=64

Isolate the equation. So:

2x^2-20x+36=0

Since the leading coefficient is one, divide both sides by two:

x^2-10x+18=0

Therefore, <em>a</em> = -10 and <em>b</em> = 18.

6 0
2 years ago
Which identify could be used to rewrite the expression x6-27
hammer [34]
The differnce of 2 perfect cubes

remember
a³-b³=(a-b)(a²+ab+b²)

so
(x^2)^3-(3)^3=(x^2-3)(x^2+3x+9)
3 0
3 years ago
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