Let us bear in mind the equivalent value of these coins:
One dime = $0.10
One quarter = $0.25
Let x = number of dimes
y<span> = number of quarters</span>
Since the boy has 70 coins in total, we can say that:
<span>x + y = </span><span>70 </span>(can be written as x = 70 – y)
Since the boy has a total of $12.40, we can say that:
0.10x + 0.25y = 12.40
To solve this problem, we need to solve this system of equation. We have to substitute the value of x as written in the first equation (x = 70 –y)
0.10(70 – y) + 0.25y = 12.40
7 – 0.10y + 0.25y = 12.40
0.15y = 5.40
y = 36
X = 70 – 36
X = 34
Therefore,<span> the boys </span>has<span> 34 dimes and 36 quarters. To check our answer, we just have to check if his money would total $12.40.</span>
34 dimes = $3.40
36 dimes = $9.00
<span>Total </span><span>$12.40</span>
Answer:
y=20
Step-by-step explanation:
25+15=40
2y=40
40/2=20
y=20
Answer:
Step-by-step explanation:
we have that
The formula for the surface area of the enclosed space is
Solve for P
That means ------> isolate the variable P
Subtract lw both sides
Multiply by 2 both sides
Divide by h both sides
Rewrite
Answer:
1ml=100 mg
5 ml= 500mg
Step-by-step explanation:
Answer:
i think that the correct answer would be B
Step-by-step explanation:
so so so so sorry if the answer is wrong
plz mark brainliest
