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Kamila [148]
3 years ago
15

What is answer to 12=4x what is x

Mathematics
2 answers:
Volgvan3 years ago
7 0
12 = 4 x / / / Divide each side by 4. / / / 3 = x .
krek1111 [17]3 years ago
6 0
Division Property of Equality.
Always use opposite operation with side that contains variable.

Isolate variable.
Divide 4 by 4 to get it by itself.

Now do the same to other side.
12\div4=3\\x=3
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How do u do this? please help
OLga [1]

Answer:

21

Step-by-step explanation:

Given that 2 parts of the ratio equals 14 green marbles, then divide to find the value of one part of the ratio.

14 ÷ 2 = 7 ← value of 1 part of the ratio, thus there are 7 blue marbles

Total marbles = 14 + 7 = 21

3 0
3 years ago
Which is the equation in slope-intercept form for the line that passes through (3, 7)
quester [9]

Answer:

y =  -  \frac{5}{3} x + 12

Step-by-step explanation:

First, rewrite the given equation in the form of y=mx+c.

m is the gradient while c is the y-intercept.

3x-5y=8

5y= 3x -8

y =  \frac{3}{5} x -  \frac{8}{5}

Thus, the gradient of the given equation is ⅗.

The product of the gradients of perpendicular lines is -1.

(gradient of line)(⅗) = -1

gradient of line= -1 ÷⅗

gradient of line= -  \frac{5}{3}

y =  -  \frac{5}{3} x + c

To find the value of c, substitute a coordinate.

When x=3, y=7,

7 =  -  \frac{5}{3} (3) + c

7= -5 +c

c= 7+5

c= 12

Hence, the equation of the line is y =  -  \frac{5}{3} x + 12.

6 0
3 years ago
A repair person charges $25 per hour plus and initial service charge of $30.
Norma-Jean [14]

Answer:

The repair person did 5 hours of work.

Step-by-step explanation:

155 = 25x + 30

125 = 25x

5 = x

6 0
3 years ago
Read 2 more answers
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larisa [96]

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3 years ago
Peter answered 15 questions on a quiz and obtained 29 points. If 3 points were given for each correct answer and one point deduc
nalin [4]

Answer: peter got 11 right and 4 wrong

Step-by-step explanation: So when he answers 11 answers correctly he gains 33 points so he loses 4 points from the remaining 4 wrong answers.

8 0
3 years ago
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