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kaheart [24]
2 years ago
9

PLEASE HELP!!

Mathematics
1 answer:
Stolb23 [73]2 years ago
7 0

Answer:

27 quarters and 37 nickels

Step-by-step explanation:

Nickels are 5¢

Quarters are 25¢

$8.60 is 172 nickels (860/5)

$8.60 is 34.4 quarters (860/25)

So then let's split it half-and-half.

425 and 435

425 would become 17 quarters.

435 would become 87 nickels.

This is still too much.

Now let's try 700 and 160.

700 would become 28 quarters

160 would become 32 nickels.

28+32=60.

This is a lot closer.

So now 27 quarters and 37 nickels. This works.

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Solve the system by substitution.<br> Y = 6x-2<br> Y = 5x
rusak2 [61]

Answer:

x = 1/3 x=0

Step-by-step explanation:

y=6x-2

2=6x

2/6 = x

1/3=x

y=5x

5x=0

divide both sides by 5

0/5 = 0

8 0
3 years ago
Read 2 more answers
There is a reservoir with five channels bringing in water. If only the first channel is open, the reservoir can be filled in13 o
Nuetrik [128]

Answer:

approximately 0.2 days

Step-by-step explanation:

Flow is defined as:

Q = V/t

where Q is flow, V is volume, and t is time

Let's call Vr to the volume of the reservoir, then for the first channel:

Q1 = Vr/t1

Replacing with t1 = 1/3 of day:

Q1 = Vr/(1/3) = 3*Vr

Similarly, or the other channels:

Q2 = Vr/1 = Vr

Q3 = Vr/(2 1/2) = 2/5*Vr

Q4 = Vr/3

Q5 = Vr/5

When all channels are open, the time needed to fill the reservoir is:

Vr = t*(Q1 + Q2 + Q3+ Q4 + Q5)

Replacing with the previous equivalences:

Vr = t*(3*Vr + Vr + 2/5*Vr+ Vr/3 + Vr/5)

Vr = t*4.93*Vr

1/4.93 = t

0.2 = t

4 0
3 years ago
She answer 42 of the 60 questions correctly on a test. What methods should she use to find the percent of questions she answered
Allushta [10]

Divide the number of questions she got correct by the total number of questions on the test them multiply the decimal answer by 100 to get the percent.

42/60 = 0.7

0.7 x 100 = 70%

7 0
3 years ago
Can someone help me please.... with number 6,7,8,9
Alenkasestr [34]

Answer :

6. x=28

7.x =6

8. x =9

9. x =9

Step-by-step explanation:

\frac{x + 2}{10}  = 3

x + 2 = 3 \times 10 \\ x + 2 = 30 \\ x = 30 - 2 \\ x = 28

6.

(x+2)/10 = 3

Cross multiply

x+2 = 10 ×3

x+2 =30

Collect like terms and simplify

x =30-2

x = 28

7.

8x + 9 - 5x = 27 \\ 8x - 5x = 27 - 9 \\ 3x = 18

\frac{3x}{3}  =  \frac{18}{3}  \\x  = 6

8x +9 -5x= 27

Collect like terms and simplify

8x-5x =27-9

3x =18

Divide both sides of the equation by 3

3x/3 = 18/3

x = 6

8.

10x+8=8x+26

Collect like terms

10x-8x=26-8

2x = 18

Divide both sides of the equation by 2

2x/2 = 18/2

x = 9

9.

2(x-5)+4x=x+35

Use 2 to open the bracket

2 × x =2x

2×(-5) =-10

2x-10+4x =x+35

Collect like terms and simplify

2x+4x-x = 35+10

5x = 45

Divide both sides of the equation by 5

5x/5 = 45/5

x =9

7 0
4 years ago
6th grade math , help me pleasee
kati45 [8]

Answer:

They got 21 wins when they have 6 losses

Step-by-step explanation:

you need to multiply 2 by whatever will get you to 6.

2*3=6

and what you do to one side you do to another side.

7*3=21

The ratio is 21:6

If you need to fill the table, you can multiply two by two and two by 4

wins | 7 | 14 | 21 | 28 |

loss  | 2 | 4   |  6 |  8 |

7 0
3 years ago
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