Answer:
x=4
Step-by-step explanation:
Step 1: Multiply both sides by 2 to get rid of the fraction:
7/2x*2=14*2
7x=28
Step 2: Divide both side by 7 to get rid of the number infront of x.
7x/7+28/7
x=4
90°=X+3X+10
X + 3X+ 10=90
4X+10=90
90-10 =80
4X=80
80/4=20
X=20
so the first year is $1700
in that case: a(1)=1700
each year it goes up by $70
then in nth year it's: a(n)=a(n-1)+70
Answer:
The answer is 23/5, or 23 over 5.
Step-by-step explanation:
4 and 3/5
Multiply the denominator by the whole number and add the numerator, all over the original denominator to calculate the improper fraction.
20 + 3 over 5
Answer:
ST = 4
Step-by-step explanation:
RS + ST = RT, substitute values
3x - 8 + x = 2x, that is
4x - 8 = 2x ( subtract 2x from both sides )
2x - 8 = 0 ( add 8 to both sides )
2x = 8 ( divide both sides by 2 )
x = 4
Thus ST = x = 4