Answer:
the first part is a
Step-by-step explanation:
4n - 8 = n + 13
4n - n = 13 + 8
3n = 21
n = 21/3
n = 7....the number(n) = 7
Answer:
6 lengths
Step-by-step explanation:
You essentially want the smallest integer solution to ...
60x ≥ 350
x ≥ 350/60
x ≥ 5 5/6
The smallest integer solution to this is x = 6.
The minimum number of lengths of hose needed is 6.
_____
Informally, you know that dividing the required total length by the length of one hose will tell you the number of required hoses. You also know the ratio 350/60 is equivalent to 35/6 and that this will be between 5 and 6. (5·6 = 30; 6·6 = 36) The next higher integer value will be 6.
Answer:
To find the area of a trapezoid, multiply the sum of the bases (the parallel sides) by the height (the perpendicular distance between the bases), and then divide by 2.
Step-by-step explanation:
Answer:
ice cream = 3.80$
cup cake = 4.25$
donuts = 2.5$
Step-by-step explanation:
a=ice cream
b = cup cake
c = donuts
we can write the following equations given from the picture:
a+b+b=12.30$ equation 1
b+c+a=10.55$ equation 2
b+c+c =9.25$ equation 3
using equation 1 we have:
2b+a=12.30
a=12.30-2b
using equation 3 we have:
2c+b=9.25
c=(9.25-b)/2
using equation 2 we have:
b+((9.25-b)/2)+12.30-2b=10.55
((2b+9.25-b)/2) - 2b = 10.55-12.30
((2b+9.25-b-4b)/2) =-1.75
-3b+9.25=2*(-1.75)
-3b= -3.5-9.25
-3b=-12.75
b=12.75/3
so we have b= 4.25$ = cup cake
we have:
c=(9.25-b)/2= (9.25-4.25)/2
c=2.5$= donuts
a= 12.30-2b= 12.30-2*(4.25)
a= 12.30-8.5 = 3.8$ = ice cream
