A container holds a combination of nickels and quarters. There are 156 coins in all, and their total value is $21.60. The system of equations models this situation, where x is the number of nickels and y is the number of quarters.x+y=156
0.05x+0.25y=21.6
How many nickels and quarters are in the container?
A.
118 nickels and 38 quarters

B.
106 nickels and 50 quarters

C.
87 nickels and 69 quarters

D.
72 nickels and 84 quarters

Answers

Answer 1

Answer: x+y=156
0.05x+0.25y=21.6

-1/4*/ x+y=156
1/20x+1/4y=216/10

-1/4x-1/4y=156*-1/4=-39

1/20x+1/4y=216/10
+--------------------------
-4/20x=-17,4

x=87

x+y=156

87+y=156 y=69

this question answer is 87 nickels and 69 quarters

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75% of 124 is what number a?

Answers

the correct answer is 93 ,

i hope this helps

You take 75% and turn it into a decimal (0.75). Then you multiply 0.75 by 124 = 93

Each side of a rectangle is increased in length by 20%. What is the percentage increase in the area?

Answers

It is 22.72% (The .72 part repeats itself so you would draw a straight line above the seven and two.

An electrical tower casts a 120-foot shadow. At the same time, a 10-footstreet sign casts a shadow of 8 feet. What is the height of the tower?

Answers

Answer:

The height of the tower is 150 ft

Step-by-step explanation:

Let the height of the tower be H feet.

The corresponding sides will then be in the same proportion.

The ratio of the shadows will be in the same proportion as the ratio of the heights.

$(H)/(10)=(120)/(8)$

We multiply both sides by 10 to get:

$(H)/(10)* 10=(120)/(8)* 10$

$H=150$

Therefore, the height of the tower is 150 ft

Answer:

Height of the tower = 150 foot

Step-by-step explanation:

We need to find height of the tower with 120-foot shadow.

We have a 10-foot street sign casts a shadow of 8 feet.

$\texttt{Ratio of height to shadow height =}(10)/(8)=(5)/(4)$

We have

$\frac{\texttt{Height of tower}}{\texttt{Shadow height of tower}}=(5)/(4)\n\n\frac{\texttt{Height of tower}}{120}=(5)/(4)\n\n\texttt{Height of tower}=(5)/(4)* 120=150feet$

Height of the tower = 150 foot

mr carlos buys 1,080 apples. 1/9 of the apples are rotten. he sells the rest at $2 for 10 apples. how much does he earn from the sale

Answers

$(1)/(9)\cdot 1080=120\n1080-120=960\n960:10=96\n96 \cdot \$2=\$192\n\nAnswer:Mr\ Carlos\ will\ earn\ \$192\ for\ the\ sale.$

Answer:

$192

Step-by-step explanation:

Mr. Carlos sells 1080 * 8/9 = 960 apples

960 apples * $2/10 apples = $192

How many Minutes and Hours are in 175, 336, and 750?

Answers

I'm assuming its 175, 336 and 750 minutes?

175 minutes:
175 divided by 60
= 2 remainder 55
= 2 hours and 55 minutes

336 minutes:
336 divided by 60
= 5 remainder 36
= 5 hours and 36 minutes

750 minutes:
750 divided by 60
= 12 remainder 30
= 12 hours and 30 minutes

What is [3.4(6x+2)+3]+4p-3x? PLS need help

Answers

Step 1: simplify

[3.4 ( 6 x + 2 ) +3] + 4 p -3 x

Pemdas!

6x+2=8x

3.4+3=6.4

6.4+8x=14.4

14.4x+4p=18.4xp+3= 21.4xpx

x=8

p=18.4

Other x = 21.4

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