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Valentin [98]
3 years ago
7

What number solves the equation x – 21 = 43

Mathematics
2 answers:
ollegr [7]3 years ago
4 0
64 because just add 21 and 43 which gives you 64 and 64 - 21 = 43, if I’m wrong then I apologize
sdas [7]3 years ago
3 0

Answer:

<u>64 - 21 = 42 </u>

Step-by-step explanation:

<u>x = 64 </u>

- Hope this helped! ^ω^

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Describe the difference between numbers with positive exponents and numbers with negative exponents
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Numbers with negative numbers become smaller such as decimals. Numbers with positive exponents become bigger in quantity
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3 years ago
Using synthetic division, find (2x4 + 4x3 + 2x2 + 8x + 8) ÷ (x + 2).
creativ13 [48]
The answer is 32x+8
————
x+2
5 0
4 years ago
A triangle has vertices (-1, 2), (3, 1), and (7, 2). What is the approximate perimeter of the triangle? Round your answer to the
larisa86 [58]
Use the distance formula to find the length of the sides, then add them up to find the perimeter.

\sf d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

For points in the form of (x1, y1), (x2, y2).

(-1, 2), (3, 1)

\sf d=\sqrt{(3+1)^2+(1-2)^2}

\sf d=\sqrt{(4)^2+(-1)^2}

\sf d=\sqrt{16+1}

\sf d=\sqrt{17}

(3, 1), (7, 2)

\sf d=\sqrt{(7-3)^2+(2-1)^2}

\sf d=\sqrt{(4)^2+(1)^2}

\sf d=\sqrt{16+1}

\sf d=\sqrt{17}

(7, 2), (-1, 2)

\sf d=\sqrt{(-1-7)^2+(2-2)^2}

\sf d=\sqrt{(-8)^2+(0)^2}

\sf d=\sqrt{64+0}

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So the perimeter will be:

\sf 8+\sqrt{17}+\sqrt{17}\approx\boxed{\sf 16.25}
3 0
4 years ago
How do I solve this system of equations by substitution? <br> y - 3x = 2, y=(x + 1)^2 - 5
Arada [10]
Hello,

y-3x=2==>x=(y-2)/3
==>(x+1)²=((y-2)/3+1)²=(y+1)²/9

y=(x+1)²-5
==>y=(y²+2y1)/9 -5
==>y²-7y-44=0  ; Δ=7²+4*44=225=15²
==>y=(7+15)/2 or y=(7-15)/2

==>y =11 and x=(11-2)/3=3
 or y=-4  and x=(-4-2)/3=-2

sol={(3,11);(-2,-4)}


5 0
3 years ago
PLEASE HELP NEED ANSWERS ASAP!
gavmur [86]

The greatest common factor of 20 and 14 is 2.

The greatest common factor of x^3 and x is x.

The answer is C. 2x

4 0
3 years ago
Read 2 more answers
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