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kkurt [141]
3 years ago
5

Three times the difference of a number and 7 is 30. Find the number.

Mathematics
1 answer:
oksano4ka [1.4K]3 years ago
8 0

Answer:

<h2>x = 17</h2>

Step-by-step explanation:

3(x - 7) = 30 is our equation, since we take 7 away from the number and then multiply the result by 3.

3x - 21 = 30

Add 21

3x = 51

Divide by 3

x = 17

To check.

3(17 - 7(

3(10)

30 = 30 Correct

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a can of cola says dat it contain 330ml a food inspector carefully measures d content of a can and find that it conatins 341ml.
daser333 [38]

Answer:

3.33%

Step-by-step explanation:

Factory measure=330 ml

Actual measure=341 ml

Difference between actual measure and factory measure is error

Difference=341 ml-330 ml=11 ml

Error (in ml)=11 ml

Percentage error=100* Error/Factory measure

Percentage error= 100*\frac {11 ml}{330}%

Percentage error=3.33%

Therefore, the percentage error in the content is 3.33%

7 0
3 years ago
2/9 of students in a school are in 6th grade, how many 6th graders are there if the school has 90 students?
dedylja [7]
20 of the students would be 6th graders, hope that helps!
3 0
3 years ago
Write a function g whose graph represents a reflection in the y-axis of the graph of f(x)=|2x−1|+3
ikadub [295]

Answer:

Step-by-step explanation:

f(x) = |2x−1|+3, reflected over the y-axis becomes

g(x) = |-2x−1|+3

We needed the point (0.5, 3) to go to the other side of the y-axis to get the point (-0.5, 3).

4 0
2 years ago
(-26) – 14.<br> Need help pls
prohojiy [21]

Answer:

-40

notice, its NEGATIVE 26 MINUS 14. same sign. When its the same sign, just add the numbers. 26+14 = 40

and REMEMBER its negative, so we add the negative sign. -40

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
DUE IN 10 MINS HELP AS SOON AS POSSIBLE ASAP ILL GIVE BRAINLIEST!!
NNADVOKAT [17]

Answer:

m = -3

Step-by-step explanation:

First, find two clear points:

(1, -2) (0, 1)

Then, use the slope formula:

m = <u>y2 - y1</u>

      x2 - x1

m = <u>1 - (-2)</u>

       0 - 1

   = <u>3</u>  = -3

     -1

m = -3

This means that the rise-over-run is -3 over 1, or 3 over -1.

Which means three down and 1 to the right, or 3 up and 1 to the left.

Slope is the steepness of the line.

5 0
3 years ago
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