All categories

3 years ago

Find the 81st term of the arithmetic sequence -10, -25, -40

Mathematics

2 answers:

nadezda [96]3 years ago

6 0

Answer:

-1210

Step-by-step explanation:

The nth term is -10-(15(n-1)) so

-10-(15(80)=

-10-1200=

-1210

Maurinko [17]3 years ago

5 0

Answer:

5 - (N x 15)

81 x 15 = 1215

5-1215=-1210

-1210 should be the 81st term

Step-by-step explanation:

You might be interested in

3(x + y) = 12

Mila [183]

Answer:

$\large\boxed{B)\ -2}$

Step-by-step explanation:

$\left\{\begin{array}{ccc}3(x+y)=12&(1)\\\\\dfrac{x}{2}=3&(2)\end{array}\right\\\\(2)\ \dfrac{x}{2}=3\qquad\text{multiply both sides by 2}\\\\2\!\!\!\!\diagup^1\cdot\dfrac{x}{2\!\!\!\!\diagup_1}=(2)(3)\\\\x=6\\\\\text{Put it to (1):}\\\\3(6+y)=12\qquad\text{divide both sides by 3}\\\\\dfrac{3\!\!\!\!\diagup^1(6+y)}{3\!\!\!\!\diagup_1}=\dfrac{12}{3}\\\\6+y=4\qquad\text{subtract 6 from both sides}\\\\6-6+y=4-6\\\\y=-2$

4 0

3 years ago

Read 2 more answers

What does y equal. -4y+6y-5=9

Phoenix [80]

Answer:

y = 7

Step-by-step explanation:

$-4y+6y-5=9$

Add -4y and 6y

$2y-5=9$

Move all terms not containing y to the right side of the equation.

$2y=14$

Divide both sides by 2

$y=7$

4 0

3 years ago

Help!!! il give brainlist

garik1379 [7]

Hours || earning
1 || 20
2 || 40
3 ||60
The rate of change is the slope
Slope is 20
If you were to write this as an equation it would basically be y=20x

5 0

3 years ago

What do i do for this problem

Margaret [11]

<span>The answer would be 20.

The question is asking you to find the value of the expression for when c = 100, so we have to put 100 where c is in the equation. Given that fact, we start with c/5, then put the 100 in for c.
c/5 = ??
100/5 = 20. </span>

4 0

3 years ago

Read 2 more answers

Please help me out on this question :)

d1i1m1o1n [39]

Answer:

my teacher gave me the exact answer for this

Step-by-step explanation:

8 0

3 years ago