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BabaBlast [244]
3 years ago
9

Decide which shipping box (or combination of boxes) she should use to ship exactly 270 necklaces.

Mathematics
1 answer:
Ann [662]3 years ago
5 0
Ndnsnkskaoaoamdmsksakaopssppskdkxm
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Sarah has a collection of nickels, dimes, and quarters worth $28.75. She has 10 more dimes than nickels and twice as many quarte
Ymorist [56]

Answer:

Step-by-step explanation:

Write an equation for each statement:

:

"Sarah has a collection of nickels, dimes, and quarters worth $15.75."

.05n + .1d + .25q = 15.75

:

"She has 10 more dimes than nickels"

d = n + 10

:

"twice as many quarters as dimes."

q = 2d

:

How many coins of each kind does she have?

:

Take the 2nd equation and arrange it so n is in terms of d also

n + 10 = d

n = (d - 10)

:

In the 1st equation substitute (d-10) for n and 2d for q:

.05n + .1d + .25q = 15.75

:

.05(d-10) + .1d + .25(2d) = 15.75

:

.05d - .5 + .1d + .5d = 15.75

:

.65d - .5 = 15.75

:

.65d = 15.75 + .5

:

.65d = 16.25

:

d = 16.25/.65

:

d = 25 dimes

:

Remember the statement "twice as many quarters as dimes."

q = 2(25)

q = 50 quarters

:

The statement "She has 10 more dimes than nickels"

n = 25 - 10

n - 15 nickels

:

Check our solutions

.05(15) + .1(25) + .25(50) =

.75 + 2.50 + 12.50 = 15.75 proves our solutions

8 0
2 years ago
Mrs. Ruan provides bike renting services. She charges $5 dollars per hour plus a one-time fee of $10. Is
Trava [24]

Answer:

A

Step-by-step explanation:

Let the number of hours spent by a costumer be X

As X increases the number of hours increases

It's a proportional relationship. If we draw the graph we see it .

7 0
3 years ago
Read 2 more answers
Zoe's mom is carpeting her room and needs to know the amount of floor space how many square feet of carpeting are needed for the
Radda [10]
The complete question in the attached figure

we know that
[Area of her bedroom]=[11*10]+[12*8/2]+[10*6]------> 218 ft²

the answer Part A) is
Are needed 218 ft² of carpeting for the room

 [perimeter of her bedroom]=[11+10+11]+[12]+[6+10+6]+[8]-------> 74 ft

the answer Part B) is
Are needed 74 ft <span>of baseboards</span> for the room

6 0
2 years ago
Read 2 more answers
How do i solve this inequality? Number 46
myrzilka [38]
6(x-2.5) ≥ 8-6(3.5+x)

A number is before a parenthesis. The first step is to multiply.

6(x-2.5) = 6x -15

8-6(3.5+x)
2(3.5+x)= 7+2x

6x-15≥7+2x

Now solve

6x-15≥7+2x
-2x -2x

(-2x+2x)= They cancel out

(6x-2x)= 4x

4x-15≥7
+15 +15

4x≥22
/4 /4

You get= x≥5.5
7 0
3 years ago
Help Me With These Please
Gwar [14]
Look up the formula to find the area of a trapezoid. Then do the math HINT: The formula is 

A= a+b/2 h
6 0
3 years ago
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