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satela [25.4K]
3 years ago
13

Solve x for 7× + 3 = 31​

Mathematics
2 answers:
olya-2409 [2.1K]3 years ago
7 0
The X after the 7 is 4

X=4
Bond [772]3 years ago
7 0

Answer:

X = 4

Step-by-step explanation:

7x + 3 = 31

Step 1: Subtract 3 from both sides.

7x + 3 - 3 = 31 - 3

7x = 28

Step 2: Divide both sides by 7.

7x/7 = 28/7

Therefore, the answer is X = 4

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Answer:200 in ^3

Step-by-step explanation:

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2 years ago
What is the slope between point A (-9, 4) and B ( 3, -2)
MaRussiya [10]

Slope can be calculated using the formula: m=   \frac{y2 -y1}{x2-x1}

y1/x1 represents the first number in the bracket

y2/x2 represents the second number in the bracket

Calculation

m =  \frac{y2 -y1}{x2-x1}

m =  \frac{4 - (-2)}{(-9)-3}

m= 6/-12

m= -0.5 or -1/2

Therefore, the answer is B.

5 0
3 years ago
A certain circle can be represented by the following equation. x^2+y^2+6y-72=0 What is the center of this circle ?
jek_recluse [69]

Answer:

(0, -3)

Step-by-step explanation:

Here we'll rewrite x^2+y^2+6y-72=0 using "completing the square."

Rearranging x^2+y^2+6y-72=0, we get  x^2 + y^2 + 6y                = 72.

x^2 is already a perfect square.  Focus on rewriting y^2 + 6y as the square of a binomial:  y^2 + 6y becomes a perfect square if we add 9 and then subtract 9:

x^2 + y^2 + 6y + 9  - 9              = 72:

x^2 + (y + 3)^2 = 81

Comparing this to the standard equation of a circle with center at (h, k) and radius r,

(x - h)^2 + (y - k)^2 = r^2.  Then h = 0, k = -3 and r = 9.

The center of the circle is (h, k), or (0, -3).

8 0
3 years ago
Can someone please answer. There is one question. There's a picture. Thank you!
barxatty [35]
Hello,

the answer is D (said Al Kashi)

6 0
3 years ago
Malory got a 75% on her math test. to earn that score, she got 27 questions correct. he many questions were on the test?
aivan3 [116]
100-75=25
27 divided by 0.25 is108
there are 108 questions on the test
8 0
3 years ago
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