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3 years ago

Express x in terms of a and b: b−7x=a−b

Mathematics

1 answer:

quester [9]3 years ago

3 0

Answer:

Step-by-step explanation:

b - 7x = a - b....subtract b from both sides

-7x = a - b - b....combine like terms

-7x = a - 2b....divide both sides by -7

x = (a - 2b) / -7....or it could be written as x = -1/7a + 2/7b

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Mary spends no more than 21 hours a week doing homework. If she spends 2/7 of the time doing her math homework, what other fract

True [87]

Answer:

6/21, 12/42

Step-by-step explanation:

Mary spends no more than 21 hours a week doing homework. If she spends 2/7 of the time doing her math homework.

The number of hours she spends doing her maths homework is calculated as:

= 2/7 × 21

= 6 hours

The other fractions that could represent the amount of time Mary spends doing her math homework is given as:

6 hours/21 hours = 6/21

Also , that could be represented as:

12/42

Therefore, the other fractions that could represent the amount of time Mary spends doing her math homework is : 6/21 , 12/42

5 0

3 years ago

(a food ball team has four chances with the ball keep going to try to make a touchdown. a team gained 7 yards,lost 2, gained 4,a

Hoochie [10]

Gained in total = 10.

Moved Backwards in total = 3.

But if you keep them all together with the amount taken away, they've only gained 8 yards.

4 0

3 years ago

Kerry has a new phone plan. It works by charging $20 per month and then $0.10 for each minute over 200 minutes.

REY [17]

Answer:

(40-20)/.10

Step-by-step explanation:

40-20 is 20, 20 divided by .10 is 200, she used 200 extra minutes.

3 0

3 years ago

Consider a circle centered at C(-2,-4). If the point P(1,-1) lies on the circle, then which of the following points also lies on

Aliun [14]

Answer:

Consider a circle centered at C(-2,-4). If the point P(1,-1) lies on the circle, then which of the following points also lies on the circle?

B. (-2+√18, -4)

C. (√18, -4)

D. (-2, 4+√18)

Step-by-step explanation:

If the distance is greater than the radius, the point lies outside. If it's equal to the radius, the point lies on the circle. And if it's less than the radius, you guessed it right, the point will lie inside the circle.

hope it's help you

7 0

3 years ago

What time is 5 3/4 hours after 9:22 pm?

Ronch [10]

Answer:

15:37 or 3:37

Step-by-step explanation:

3/4=0.75

0.75+9.22=9.97

5+9.97=14.97

6 0

3 years ago