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USPshnik [31]
3 years ago
10

Help please please please​

Mathematics
2 answers:
LekaFEV [45]3 years ago
8 0

Answer:

There are 9 quarters and 3 nickels

Step-by-step explanation:

problems used: 0.5x+0.25y=3.09

x=y+6

so substitute what x is equal to into the problem

0.5(y+6)+0.25y=3.09  <--------- distribute

0.5y+3+0.25y=3.09     <--------- Combine like terms

0.3y+3=3.09 <----------- Subtract 3 on both sided to get y by itself

0.3y=0.9 <------------ Divide by 0.3 on both sides to get what y is equal to

y=3 <-------- now substitute to find what x is equal to

x=3+6

x=9

puteri [66]3 years ago
6 0

Answer:

There are 8 nickels and 14 quarters.

Step-by-step explanation:

Let n and q represent the numbers of nickels and quarters present.  

Then q = n + 6 states that there are 6 more quarters than there are nickels.

($0.25)(q) + ($0.05)n = $3.90, in which we substitute n + 6 for q:

($0.25)(n + 6) + ($0.05)n = $3.90

Combining the n terms, we get 0.25n + 0.05n = 3.90 - 0.25*6, or:

                                                           0.30n           = 3.90 - 1.50, or:

             $2.40

n = ----------------------- = 8

               0.30

There are 8 nickels and 14 quarters.

Check:  14 quarters comes to $3.50 and 8 nickels to $0.40, and $3.50 + $0.40 sums up to $3.90.

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Pavlova-9 [17]

Answer:

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Step-by-step explanation:

90,000 - 350 = 89,650 - 400 = 89,250

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3 years ago
Pi/24 is the solution for 4cos2 (4x) - 3 = 0<br><br> True or false
inessss [21]

Answer:

True.

Step-by-step explanation:

Given,

4cos2 (4x) - 3 = 0

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Or, cos π/6 = √3/2

Or, cos^2 π/6 = 3/4

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Now, Left Hand Side= 4cos2 (4x) - 3

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Here, Left Hand Side= Right Hanad Side. So, 4cos2 (4x) - 3=0 is true.

5 0
3 years ago
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Use two unit multipliers to convert 1250 square inches to square feet
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4 0
3 years ago
Mrs. Blalock gave her students a math test. Each problem on the test was worth 4.5 points. The grade on the test, y, can be calc
umka2103 [35]

Answer:

4,5*16=y

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Step-by-step explanation:

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Help pleaseeeeee thanks i hope u have a good day
VikaD [51]

Answer:

12825$

Step-by-step explanation:

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