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shepuryov [24]
3 years ago
13

Grace earns $7 for each car she washes. She always saves $21 of her weekly earnings. This week, she

Mathematics
1 answer:
Ugo [173]3 years ago
6 0

Answer: 13

Step-by-step explanation:

66\geq 7x-21

add 21 both sides

87\geq 7x

divide both sides by 7

12.4\geq x

So more than 13 cars

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What is the degree of the polynomial?​
Elden [556K]

Answer: 3rd Degree

Step-by-step explanation:

8 0
3 years ago
The sum of 2 numbers (x and y) is 20, and their product is 51. What are the values of x and y
Murljashka [212]

Answer: 13&7

Step-by-step explanation:

The sum of two numbers x&y is 20

Product of the 2numbers xy is 51

X+y=20......equation 1

XY=51.........equation 2

X=20-y.......equation 3

Substitute for x inequation 3 into equation 2

So we have;

(20-y)y=51

Open the bracket

20y-y^2=51

Collect like terms,so we have

Y2-20y+51=0

Factorise

Factors of 51 is 13&7

So -13-7=-20 &-13×-7=51

Substitute

Y2-13y-7y+51=0

Y(y-13)-7(y-13)=0

(Y-7)(y-13)=0

Y-7=0

Y=7 or

Y-13=0

Y=13

Y=13 or 7

Substitute for y in equation 1

X+y=20

X+7=20

X=20-7

X=13 or

X+13=20

X=20-13

X=7

Therefore, X &Y = 13 &7

4 0
2 years ago
57.99 The 9 in the hundredths place is _______ the value of the 9 in the tenths place.
Karolina [17]

Answer:The 9 in the hundredths place is 0.1x the value of the 9 in the tenths place.

Step-by-step explanation:

Every place going forward is 10x forward, so this means that every place going backwards is 0.1x.

8 0
2 years ago
Read 2 more answers
7m+9, for m=2.<br> Someone solve please
photoshop1234 [79]

Answer:

23

Step-by-step explanation:

7m + 9 =

7 x (2) + 9 =

14 + 9 =

23

<em>Hope that helps!</em>

6 0
2 years ago
Read 2 more answers
Gias gross annual salary is 46,392. what is the recommended maximum monthly rent she should pay?
jeyben [28]
The maximum monthly rent that she should pay is 2,784.
Solution:
1,082 x 12 months = 12,984
1,648 x 12 months = 19,776
1,933 x 12 months = 23,196
2,784 x 12 months = 33,408

Since her annual salary is 46,392, she can still afford to pay the rent for 2,784 per month, which equals to 33,408 annually. 
5 0
3 years ago
Read 2 more answers
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