Answer:
add 2 to 15/19 to get 17/19
Step-by-step explanation:
Answer:
4y( 4xy + 7x +2)
Step-by-step explanation:
16xy^2+28xy+8y
16xy^2 =2*2*2*2*x*y*y
28xy = 2*2*7 *x*y
8y = 2*2*2*y
The common factors are 2*2*y = 4y
2*2*2*2*x*y*y + 2*2*7 *x*y+2*2*2*y
2*2*y( 2*2*x*y + 7 *x+2)
4y( 4xy + 7x +2)
Answer:
x = 3.8
y = 15.2
Step-by-step explanation:
y = 4x
y = 19 - x,
if y = y then,
4x = 19 - x
5x = 19
x = 19/5 = 3.8 now inputting the answer to x into one of the unchanged equations above (y = 4x),
y = 4x = 4*3.8 = 15.2
Double check:
y = 19 - x = 19 - 3.8 = 15.2
Answer:
take the population mean divided by four
Step-by-step explanation:
Answer:
50 nickels, 20 quarters.
Step-by-step explanation:
System of equations (q = # of quarters, n = # of nickels):
<em>q + n = 70, 0.25q + 0.05n = 7.50</em>
the first equation can be changed to q = 70 - n, so we are able to <em>substitute q with 70 - n</em>.
So, it will look like <em>0.25*70 - 0.25n + 0.05n = 7.50</em>. This can be simplified to <em>0.2n = 10</em>, which means that n = 50.
Knowing that we can solve <em>q + 50 = 70</em>, which means that q = 20.
