Answer:
Total number of quarters=10
Total number of nickels=19
Step-by-step explanation:
The expression for the total value of money you have is;
Quarters have a value of= $0.25
Nickels have a value of= $0.05
Total value=(value of quarters×number of quarters)+(value of nickels×number of nickels)
where;
Total value=$3.45
Value of a quarter=$0.25
number of quarters=x
Value of a nickel=0.05
number of nickels=y, but y=x+9
replacing;
3.45=(0.25×x)+0.05(x+9)
3.45=0.25 x+0.05 x+0.45
3.45=0.3 x+0.45
0.3 x=3.45-0.45
0.3 x=3
x=3/0.3
x=10
y=x+9=10+9=19
Total number of quarters=10
Total number of nickels=19
All you have to do is divide 354 by 6 to get mile per hour.
The rate of speed is 59miles/hr
Answer:
She has to score 8.5 on the balance beam to win .
Step-by-step explanation:
The average score for the gymnast to win the competition is 8.1
Her score was 7.3 on the uneven bars, 8.9 on the floor exercise, and 7.7 on the vault. We have to find how much she has to score on the balance beam for her team to win.
The average score of all the parts must be equal to 8.1
let her score on the balance beam be x.
Now we take the average,
8.1 = ![\frac{7.3 + 8.9 + 7.7+x}{4}](https://tex.z-dn.net/?f=%5Cfrac%7B7.3%20%2B%208.9%20%2B%207.7%2Bx%7D%7B4%7D)
x = 32.4- 23.9 = 8.5
She has to score 8.5 on the balance beam to win .
Yuppp, you can use Desmos
Answer:
Area=90mi
Step-by-step explanation:
To find the area of a triangle, multiply the base by the height, and then divide by 2. The division by 2 comes from the fact that a parallelogram can be divided into 2 triangles.