Answer:
Her equation system is incorrect
Step-by-step explanation:
Remember that
1 dime=$0.10
1 quarter=$0.25
Let
x------> the number of quarters
y-----> the number of dimes
we know that
0.25x+0.10y=20.70 ------> equation A
x=10+y -----> equation B
Her equation system is incorrect, because in her second equation she exchanged the variables, using x instead of y and y instead of x.
Answer:
14.3 km (1 d.p.)
Step-by-step explanation:
To find the <u>mean</u>, divide the sum of all data values by the total number of data values.
If Mark ran a mean distance of 13.2 km in five days, we can use the mean distance for each of the 5 days in our calculation.
Answer:
-7/2y
Step-by-step explanation:
cancel out the Z's than youre left with -7/2y :}
Answer:
9/35
Step-by-step explanation:
-1/7 ÷ -5/9
Copy dot flip
-1/7 * -9/5
Multiply the numerators
-1*-9 = 9
Multiply the denominators
7*5 = 35
9/35
Answer:
if you convert inches to cm...
Step-by-step explanation:
9inch=22.86cm
12inch=30.48cm
V=TTr²h
TT= 3.14
V= 3.14×22.86²×30.48
V= 50014.6cm³
if you don't convert inches to cm...
V=TTr²h
V=3.14 ×9×12
V=339.12cm³
