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4 years ago

I need help with this

Mathematics

2 answers:

marysya [2.9K]4 years ago

8 0

The two angles form a a straight line which is equal to 180 degrees:

Make an equation:

57 + (x +23) = 180

Simplify:

x + 80 = 180

Subtract 80 from both sides:

x = 100

melisa1 [442]4 years ago

5 0

Answer:

x= 100

Step-by-step explanation:

the line would equal 180 in total so first subtract 57 then subtract 23 and you have x

180 - 57 = 123

123 - 23 = 100

x = 100

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1. In some music, a whole note equals one measure, a quarter note

Ipatiy [6.2K]

Answer:

3 eighths are needes to make up the rest of the measure.

Step-by-step explanation:

1/4 + 1/4 + 1/ 8 + x = 1

2/4 + 1/8+x=1

4/8 + 1/8+x=1

5/8 + x=1

x=1 - 5/8

x=3/8

We need three eights.(Because 3/8=1/8+1/8+1/8 and 1/8 represents an eights)

5 0

3 years ago

PLEASE HELP ASAP! Classify the polynomial, 8m^3–10m^2– 7, by degree and number of terms.

Lana71 [14]

Answer:

Step-by-step explanation:

The answer is m • (2m - 3) • (4m + 1)

6 0

3 years ago

Solve. 5 + 2(x + 1) = 2x

Zinaida [17]

No solution :P

i even used photomath to do this, it doesnt show anything

8 0

3 years ago

−4m+7=−5 what is m and no you are not adding -4 + m you are multiplying -4 by m

vfiekz [6]

Answer:

m=3

Step-by-step explanation:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation

Pull out like factors :

-4m + 12 = -4 • (m - 3)

Add 3 to both sides of the equation :

m = 3

6 0

3 years ago

<img src="https://tex.z-dn.net/?f=%20-%20x%20%5E%7B2%7D%20%20%2B%202x%20-%206%20%3D%200" id="TexFormula1" title=" - x ^{2} + 2x

Nimfa-mama [501]

Answer:

there are several methods to "solve a quadratic"

you can look them all up...

Graphing, factoring, completing the square, taking roots, quadratic formula are the common methods....

given the way you are asking the question I think that you are supposed to use the quadratic formula ..

please look at the image of the formula and

realize that you problem has

a=-1

b=2

c=6

just plug in those numbers into the formula and you will get the results in the "answer"

NOTE $\sqrt{-x}$ is written as ix ( $\sqrt{-25} = 5i$ )

Step-by-step explanation:

x= -2+√ (2)²- (4)(-1)(-6)

(2)(-1)

and

x= -2-√ (2)²- (4)(-1)(-6)

(2)(-1)

8 0

3 years ago

I need help with this ​

I need help with this