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sertanlavr [38]
3 years ago
13

The 7th term of an AP is 4 and its common difference is -4. What is the first term?

Mathematics
1 answer:
Dennis_Churaev [7]3 years ago
8 0

Answer: 28

Step-by-step explanation:

The 7th term of an AP is 4 and its common difference is -4. The 7th term of an arithmetic progression is written as:

a + 6d = 4

where,

a = first term

d = common difference= -4

a + 6d = 4

a + 6(-4) = 4

a - 24 = 4

a = 4 + 24

a = 28

The first term is 28.

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What is the number of sides of a regular n gon if one of the extierior angles is 40 degrees?
sertanlavr [38]
Sum of all exterior angles = 360°

Size of one exterior angle = 40°

Number of sides = 360 ÷ 40 = 9

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Answer: There are 9 sides to this polygon.
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4 0
3 years ago
Write in decimal form:
Nuetrik [128]
This makes no sense could you rewrite it please
6 0
3 years ago
I need some help and can you please show your work? Thank you have a good day
SVEN [57.7K]
$1.75

If 4 lemons altogether cost $7, you want to divide the price by 4 to find the price for one single lemon.

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3 0
3 years ago
How to solve-2(p+-8)+-2=6
natka813 [3]

Answer:

p=4

Step-by-step explanation:

first change all the addition signs in to minus if the numbers are negative.    ex. p+-8 = p-8.

So the equation equals to -2(p-8)-2=6.

Next +2 to both sides to cancel out the -2 and you get -2(p-8)=8

Divide both sides by -2 and you get (p-8)=-4. At this point you can remove the parenthesis. So the equation is p-8=-4

Finally +8 to both sides and you get p=4

3 0
3 years ago
Read 2 more answers
Solve the equation for b ​
Keith_Richards [23]

Answer:

D. b=7a

Step-by-step explanation:

Add -11/3a to both sides.

\frac{1}{3}b=\frac{7}{3}a

Divide both sides by 1/3

1 /3 b ÷1/ 3 = 7/ 3 ÷a 1 /3

and the answer is

b=7a

ik this doesnt make any sense but hope this helps

5 0
3 years ago
Read 2 more answers
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