Need help please :) I've done the steps for how I thought I should solve this, but at the end I got stuck.

The coins in the store s cash register total $12.50. The cash register contains only nickels, dimes, and quarters. There are twi

Oduvanchick [21]

Nickels is 0,05 of dolar - n
dimes is 0,1 o dolar -d
quarters is 0,25 of dolar -q
dimes =2nickels
d=2n
quarters=2dimes
q=2d=4n
12,5=n(0,05)+2n(0,1)+4n(0,25)
12,5=0,05n+0,2n+n
12,5=1,25n
n=10
q=4n=40
There are 40 quarters

5 0

3 years ago

Big Bob’s Pizza is having a special on pizza and is offering two different choices:

Anna71 [15]

Answer:

The Choice N#1 will give more pizza for your money

Step-by-step explanation:

step 1

Find the area of one slice Choice #1

The area of the circle is equal to

$A=\pi r^{2}$

we have

$r=22/2=11\ in$ ----> the radius is half the diameter

assume

$\pi =3.14$

The area of one slice is equal to

$A=(1/8)\pi r^{2}$

substitute

$A=(1/8)(3.14)(11)^{2}$

$A=47.4925\ in^{2}$

Divide the cost by the area

$4.95/47.4925=0.10\frac{\$}{in^{2}}$

step 2

Find the area of the entire personal pizza Choice # 2

The area of the circle is equal to

$A=\pi r^{2}$

we have

$r=6/2=3\ in$ ----> the radius is half the diameter

assume

$\pi =3.14$

substitute

$A=(3.14)(3)^{2}$

$A=28.26\ in^{2}$

Divide the cost by the area

$3.75/28.26=0.13\frac{\$}{in^{2}}$

therefore

The Choice N#1 will give more pizza for your money

5 0

3 years ago

HERE ARE TWO NUMBER MACHINES A AND B

nika2105 [10]

Answer:

$x=-7$

Step-by-step explanation:

We can write them both like functions like this

$A=5x-4$

$B=3x+8$

Where

x=input

A=Output A

B=Output B

We want the output of A 3 times the output of B this can be written like this:

$A=3B$

we replace with the functions

$5x-4=3(3x+8)$

we solve for x

$5x-4=9x+24\\5x-9x=24+4\\-4x=28\\x=\frac{28}{-4}\\x=-7$

The output that makes the out put of A 3 times teh output of B is $-7$

5 0

2 years ago

JUAN DECIDE PINTAR LAS PAREDES DE SU CASA UN TOTAL DE 200 METROS LOS DOS PRIMEROS DIAS PINTO 33 METROS CADA DIA AL TERCER DIA CO

Stells [14]

Answer:

38 metros

Step-by-step explanation:

Número total de metros que Juan quiere pintar su casa = 200 m

Durante los primeros 2 días, pintó = 33 m todos los días

Por lo tanto, el número total de metros que pintó = 33 m × 2 = 66 m

Al tercer día, practica la pintura = 96 m

El número de metros que quedan por pintar se calcula como:

200m - (66m + 96m)

Los 200m - 162m

= 38m

8 0

2 years ago

What is the value of x?<br> Enter your answer in the box.<br> x =

Svetllana [295]

Answer:

Step-by-step explanation:

The two triangles are similar and therefore we can set up a proportion

9/(9 + 72) = (3x - 20)/(3x - 20 + 56) Combine like terms on the right

9/(81) = (3x - 20)/(3x + 36) Cross multiply

9(3x + 36) = 81 (3x - 20) Remove the brackets.

27x + 324 +1620 = 243x Add 1620 to both sides

27x + 324 + 1620 = 243x Subtract 27x from both

1944 = 216x divide both sides by 216

x = 9

If you feel comfortable canceling the size of the numbers can be reduced.

9/81 = 1/9

1/9 = (3x - 20)/(3x + 36)

3x + 36 = 9(3x - 20)

3x + 36 = 27x - 180

36 + 180 = 24x

216 = 24x

216/24 = x

x = 9

There is another cancelation possible, but this is simple enough.

6 0

2 years ago