D=dimes
q=quarters

d + q = 20
.10d + .25q = 3.05

d=-q + 20

.10(-q + 20) +.25q = 3.05
-.10q + 2 + .25 = 3.05
.15q + 2 = 3.05
.15q + 2 - 2 = 3.05 - 2
.15q = 1.05
.15q/.15 = 1.05/.15
q = 7

d + 7 = 20
d + 7 - 7 = 20 - 7
d = 13

Sally has 7 quarters and 13 dimes.
Hope this helps!

5 0

3 years ago

Asap plz solve problem give brainliest

Eduardwww [97]

Answer:

The value of x is 84 and the remaining angles are: 76° and 86°

Step-by-step explanation:

Given three angles are

x-8

and

x+2

We have to find the angles and for that we have to find the value of x

As we know that the sum of internal angles of a triangle is 180°

So,

$18+(x-8)+(x+2) = 180\\18+x-8+x+2 = 180\\2x+12 = 180\\2x = 180-12\\2x = 168\\x = \frac{168}{2}\\x = 84$

And the angles are:

x-8 = 84-8 = 76

x+2 = 84+2 = 86

Hence,

The value of x is 84 and the remaining angles are: 76° and 86°

8 0

3 years ago