1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Varvara68 [4.7K]
2 years ago
13

I need help I’m in my class plz help me

Mathematics
2 answers:
PtichkaEL [24]2 years ago
4 0
The answer is 1/2( a-8)
geniusboy [140]2 years ago
4 0
1/2 the answer is good luck
You might be interested in
The first two terms in an arithmetic progression are -2 and 5. The last term in the progression is the only number in the progre
Rudik [331]

Given:

The first two terms in an arithmetic progression are -2 and 5.

The last term in the progression is the only number in the progression that is greater than 200.

To find:

The sum of all the terms in the progression.

Solution:

We have,

First term : a=-2

Common difference : d = 5 - (-2)

                                      = 5 + 2

                                      = 7

nth term of an A.P. is

a_n=a+(n-1)d

where, a is first term and d is common difference.

a_n=-2+(n-1)(7)

According to the equation, a_n>200.

-2+(n-1)(7)>200

(n-1)(7)>200+2

(n-1)(7)>202

Divide both sides by 7.

(n-1)>28.857

Add 1 on both sides.

n>29.857

So, least possible integer value is 30. It means, A.P. has 30 term.

Sum of n terms of an A.P. is

S_n=\dfrac{n}{2}[2a+(n-1)d]

Substituting n=30, a=-2 and d=7, we get

S_{30}=\dfrac{30}{2}[2(-2)+(30-1)7]

S_{30}=15[-4+(29)7]

S_{30}=15[-4+203]

S_{30}=15(199)

S_{30}=2985

Therefore, the sum of all the terms in the progression is 2985.

6 0
3 years ago
Please help <br><br> f(x)=x^2+x-1<br> g(x)=-3x+12 <br><br> Find g(f(x))
Alecsey [184]

Answer: -3x^2-3x+9

Step-by-step explanation:

-3(x^2+x-1)+12 = -3x^2-3x-3+12 = -3x^2-3x+9

7 0
2 years ago
Answer this question step by step​
KiRa [710]

I hope this help you

3 0
2 years ago
Using a calculator change2 11/16 into a decimal
Natali [406]
Hey You!

2 11/16 = 2.6875 as a decimal.

That's Your Answer! ^
3 0
3 years ago
Read 2 more answers
A car used 1/ 64 of a gallon of gas to drive 1 4of a mile. At this rate, how many miles can the car travel using 1 gallon of gas
Dovator [93]

Answer: 16 miles

Step-by-step explanation:

The car used 1/64 gallons to travel 1/4 miles. To find out how many miles the car can travel using 1 gallon, use direct proportion:

1/64 gallons            :              1/4 miles

1 gallon                   :                  x miles

Cross multiply:

1/64x = 1/4

x = 1/4 ÷ 1/64

= 1/4 * 64/1

= 16 miles

On one gallon of gas, the car can travel 16 miles.

5 0
3 years ago
Other questions:
  • Ivan has 4 hours of music on his mp3 player. Jazz makes up ¹/6 of the total time. how many hours of jazz are on Ivan's mp3 playe
    11·1 answer
  • The width of a rectangle is 3 more than twice its length. the area is 35 square meters what is the length of the rectangle
    10·1 answer
  • At a farm the ratio of cows to horses was 9:2. if there were 72 cows at the farm, how many horses were there?
    12·2 answers
  • ASAP! GIVING BRAINLIEST! Please read the question THEN answer CORRECTLY! NO guessing. I say no guessing because people usually g
    14·2 answers
  • What is the factorizaion of the polynomial graphed below? assuming it has no constant factor.​
    12·1 answer
  • I need number line answers thanks alot!
    6·1 answer
  • (1-sin^ 2 theta)(tan theta)=?
    14·1 answer
  • The woods behind Adam's house were 12 miles wide and 25 miles long. What is the area and perimeter
    14·1 answer
  • "select all the numbers that are solutions to the equation x^3=27"
    8·1 answer
  • Evaluate and match each expression on the left to its value on the right, when x = 9 and y = 6.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!