"y/5+8=7, what is the value of y/5-2?" Simplify the first equation:

y/5 = 7 - 8, or -1, so y/5 = -1, or y = -5.

Then y/5 - 2 equals -5/5 - 2, or -3.

4 0

3 years ago

What's the difference when five squared is subtracted from four cubed?

elena55 [62]

$4^3-5^2= 4\cdot 4 \cdot 4-5\cdot 5 = 64-25 = 39$

4 0

3 years ago

Take the points, I dont need them much, and you need it more than I do!

galben [10]

Answer:

Step-by-step explanation:

1/2+1/2=1

0.5+0.5=1

There!

7 0

3 years ago

Read 2 more answers

If aₙ = 3(3)ⁿ⁻¹ , what is S₃? 12 27 9 39

Allushta [10]

Answer:

$S_3=39$

Step-by-step explanation:

The nth term of the sequence is

$a_n=3(3)^{n-1}$

To get the first term, substitute n=1,

$a_1=3(3)^{1-1}=3$

To get the second term, substitute n=2,

$a_2=3(3)^{2-1}=9$

To get the third term, substitute n=3,

$a_3=3(3)^{3-1}=27$

The sum of the first three terms is

$S_3=3+9+27=39$

We could also use the formula

$S_n=\frac{a_1(r^n-1)}{r-1}$ to get the same result.

8 0

3 years ago

Read 2 more answers