Answer:
Thus, Sue has 24 dimes and 76 quarters.
steps:
Let d be the number of dimes Sue has and let q be the number of quarters As she has 2140 cents total, a dime is worth 10 cents, and a quarter is worth 25 cents, we obtain the following system of equations:
{
d
+
q
=
100
10
d
+
25
q
=
2140
From the first equation, we have
d
=
100
−
q
Substituting that into the second equation, we have
10
(
100
−
q
)
+
25
q
=
2140
⇒
1000
−
10
q
+
25
q
=
2140
⇒
15
q
=
1140
⇒
q=
1140
/15
=
76
Knowing that q
=
76 we can substitute that value into the first equation to obtain
d
+
76
=
100
∴
d
=
24
The answer I think should be 0.2, and I just used my calculator so I dont really know how to explain how to do it. I dont know FOR SURE if that answer is right tho.
Answer:
When rounding to a decimal place, all digits to the right of the rounded place are dropped. For example, 6.0835 rounded to the nearest tenth is 6.1, to the nearest hundredth is 6.08, and to the nearest thousandth is 6.084.
Step-by-step explanation:
Answer:
On the first situation the previous salary was $100,000 and on the second one the raise was 20%.
Step-by-step explanation:
On the first situation there was a decrease of 25% from the previous value, this mean that the present value is 100 - 25 = 75 % from what it was before. In order to calculate the previous value we can apply a rule of three as follows:
x -> 100%
75,000 -> 75%
x*75 = 75,000*100
x*75 = 7,500,000
x = 7,500,000/75 = 100,000
On the second situation there was an absolute increase of 78 - 65 = 13, this value represents the rate we want to know. In order to find the rate we can apply a rule of three as follows:
65 -> 100 %
13 -> x
1300 = 65*x
65*x = 1300
x = 1300/65 = 20 %
On the first situation the previous salary was $100,000 and on the second one the raise was 20%.
I’m trying to get points so I’m not answering this
