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3 years ago

I NEED HELP PLZ, PLZ, I NEED HELP, I AM BEGGING YOU

Mathematics

2 answers:

erastova [34]3 years ago

8 0

Answer:

tn = 8n -7

Step-by-step explanation:

given : t2=9, t4=25

the formula is:

tn = t1 + (n-1) d

gonna find d first:

d = (25-9) /(4-2) = 16/2 = 8

and find tn1:

t1 = 9-8 = 1

so, tn = 1 + (n-1) (8) = 1 +8n -8

tn = 8n -7

mel-nik [20]3 years ago

7 0

Answer:

Solution given

n th term[tn]=?

1st term =a

difference =d

we have

t2=9

a+(n-1)d=9

a+(2-1)d=9

a+d=9

a=9-d..................[1]

again

t4=25

a+(n-1)d=25

a+(4-1)d=25

now

substituting value of a

9-d+3d=25

2d=25-9

d=16/2

d=8

substituting value of d in equation 1.

,a=9-8

a=1

we have

tn term =a+(n-1)d=1+(n-1)8=1+8n-8=8n-7

n th term =8n-7 

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Mario has $14.35 left it as wallet.

konstantin123 [22]

Answer:

Approximately $255

Step-by-step explanation:

If we need to find how much money Mario had before he spent money, we would have to add the prices that he spent to 14.35.

$14.35 + 148.43 + 92.05 = 254.83$ ≈ 255

Mario should of started out with $254.83 in his wallet.

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2 years ago

There are 6 gray keys for every 11 black keys. Also, the number of black keys is 2 less than twice the number of gray keys. Use

emmainna [20.7K]

$\text{ Answer: There are }12\text{ gray keys.}\\\\\text{ there are }22\text{ black keys.}$

Explanation:

Since we have given that

There are 6 gray keys for every 11 black keys .

So, the ratio will be 6:11

Let the number of gray keys be 6x

Let the number of black keys be 11x

Now, according to question,

$11x=2\times 2x-2\\\\11x=12x-2\\\\11x-12x=-2\\\\-x=-2\\\\x=2$

so,

$\text{ there are }6x=6\times 2=12\text{ gray keys.}\\\\\text{ there are }11x=11\times 2=22\text{ black keys.}$

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3 years ago

Name a pair of perpendicular lines

lesantik [10]

Answer:

90 degree angled lines

Step-by-step explanation:

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3 years ago

a coyote can run up to 43 mph while a rabbit can run up to 35 mph. Write two equivalent expressions and then find how many more

Dafna11 [192]

The coyote can run 48 more miles than the rabbit

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3 years ago

Mr. Littles is building a triangular sandbox using three boards. He already has two boards that measure 9 feet and 12 feet. Sele

Bess [88]

Answer:

9 feet, 15 feet, 19 feet

Step-by-step explanation:

Options are:

2 feet
3 feet
9 feet
15 feet
19 feet
21 feet
30 feet

-------------------------------------

Use the triangle inequality theorem: sum of any two side must be greater than the third side by length

2 feet ⇒ no, as 2 + 9 < 12
3 feet ⇒ no, as 3 + 9 = 12
9 feet ⇒ yes
15 feet ⇒ yes
19 feet ⇒ yes
21 feet ⇒ no, as 9 + 12 = 21
30 feet ⇒ no, as 9 + 12 < 30

6 0

2 years ago