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3 years ago

Without using Desmos what is the complete factorization of 5x^2-20? Please show work , please help

Mathematics

1 answer:

Simora [160]3 years ago

3 0

Answer:

$5(x+2)(x-2)$

Step-by-step explanation:

Find the greatest common factor (GCF) of the 2 terms:

GCF is 5.

Factor out the GCF:

$5x^2-20\\5(\frac{5x^2}{5} -\frac{20}{5} )\\5(x^2-4)$

Rewrite as a difference of squares ( $a^2-b^2=(a+b)(a-b)$ ):

$5(x^2-2^2)\\5(x+2)(x-2)$

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16d + 20c + 5d -7 - 8c - 7d + 3 Evaluate the expression if: d= -3 and c= 4

IrinaK [193]

Answer:

Step-by-step explanation:

16x-3= -48

5x-3= -15

-7x-3= 21

=-42

20x4= 80

-8x4= -32

= 48

-7+3= -4

3 0

3 years ago

Pls help...................

bearhunter [10]

First one b ≤ 9 good luck

5 0

3 years ago

9 Quesions, 30 Points!!!! PLEASE HELP!

Sloan [31]

Note: I'm afraid I can't put the work for the answers, for lack of time =/
============================================================

1. 0 or -3

2. 0 or 4

3. -2 or 3

4. 0 or 1/2

5. -2 or 3

6. 0 or 5

7. 0 or 7

8. 0 or -2
============================================================

9. Substitute 0 for h in "h = -16x^2 + 16x" then solve for x
0 = -16x^2 + 16x

Subtract -16x^2+16x from both sides.
0−(−16x2+16x)=−16x2+16x−(−16x2+16x)
16x2−16x=0

Factor the left side of the equation
16x(x−1)=0

Set factors to equal 0
16x=0 or x−1=0
x = 0 or x = 1

3 0

3 years ago

Don’t understand someone explain please

makvit [3.9K]

Answer:

Sin A = 11/61

Step-by-step explanation:

Reference angle (θ) = A

opp = 11

Hyp = 61

Adj = 60

Sin θ = opp/hyp

Sin A = 11/61

3 0

3 years ago

SOCIAL SECURITY Social Security numbers are of the form XYZ - MN - ABCD. A. The first three digits XYZ are referred to as the ar

aev [14]

Social Security numbers are of the form XYZ - MN - ABCD

Part A:

The first three digits XYZ are referred to as the area number

X is a number 1 - 7 (1, 2, 3, 4, 5, 6, 7)

That means we have 7 choices for X

Y and Z can be any number 0 - 9 (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)

That means we have 10 choices for Y and also 10 choices for Z

So, the number of possible ways are

$7\times10\times10=700$

But we know that the area code 666 has never been used.

So we need to subtract this one from the total.

$700-1=699$

Therefore, the total number of possible area codes is 699.

6 0

1 year ago