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S_A_V [24]
3 years ago
13

NEED HELP ASAP, PLEASE

Mathematics
2 answers:
kozerog [31]3 years ago
6 0

Answer:

3

Step-by-step explanation:

8x and 7x + 3 are vertically opposite angles.

Vertically opposite angles are equal,

8x = 7x + 3

8x - 7x = 3

x = 3

ch4aika [34]3 years ago
5 0

Answer:

DCE=156°

Step-by-step explanation:

8x=7x+3

8x-7x=3

x=3

BCD+DCE=180

8x+DCE=180

24+DCE=180

DCE=180-24

DCE=156°

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What are the solutions to the equation 0 = x2 – x –6? Select two options
KatRina [158]

Answer:

x=3 or x=-2

Step-by-step explanation:

This is factorable.

The leading coefficient is 1.

Since this is a quadratic all we have to do is find two numbers that multiply to be c and add up to be b to factor the expression that is to the left of the equal sign.

By the way a quadratic expression looks like ax^2+bx+c.

So we want to find two numbers that multiply to be -6 and add up to be -1.

Those numbers are -3 and 2 since (-3)(2)=-6 and -3+2=-1.

So the factored form is:

(x-3)(x+2)=0.

Since we have a product is zero then at least one of the factors need to be zero in order for the equation to hold.

So this means we have the following two equations to solve:

x-3=0 or x+2=0

First equation we will add 3 on both sides.

Second equation we will subtract 2 on both sides.

x=3 or x=-2

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3 years ago
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alexandr402 [8]

Answer: 15/8

Step-by-step explanation:

6 0
2 years ago
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Which statement best explains the value of 18 - (-5)?
leonid [27]

Answer:

The additive inverse of −5 is +5, so 18 − (−5) = 23. The additive inverse of −5 is −5, so 18 − (−5) = 23. The additive inverse of −5 is −5, so 18 − (−5) = 13.

4 0
3 years ago
Speeeeeeeedddddddddddddddddddddddddddddddd
Olin [163]

Answer:

I would be ...

75/8

multiple 9 by 8 and then add 3

Hope this helps!

Step-by-step explanation:

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Akimi4 [234]

Answer:

<u>First</u><u> </u><u>term</u><u> </u><u>is</u><u> </u><u>1</u><u>2</u>

Step-by-step explanation:

a _{n} = 12 - 4(n - 1)

• For the first term, n is 1:

a _{1} = 12 - 4(1 - 1) \\ a _{1} = 12 - 0 \\  \\ { \underline{ \:  \: a _{1} = 12 \:  \: }}

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3 years ago
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