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4 years ago

Anyone care to help me with 5 7th grade math questions? I'll upvote

Mathematics

1 answer:

Amiraneli [1.4K]4 years ago

7 0

I might be able to. post them and lets see

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Find the 91st term of the arithmetic sequence 4, 6, 8,

olga_2 [115]

Answer:

91st term of the arithmetic sequence 4, 6, 8... is 184.

Step-by-step explanation:

Comman difference = 8 - 6 = 2
a = 4
n = 91

$\longrightarrow \: \: a _{n } =a (n - 1)d$

$\longrightarrow \: \: a_{91} = 4(91 - 1) \times 2$

$\longrightarrow \: \: a _{91}= 4 +(90) \times 2$

$\longrightarrow \: \: a _{60}= 4 + 180$

$\longrightarrow \: \: a_{60}= 184$

$\therefore$ 91st term of the arithmetic sequence 4, 6, 8.. is 184

8 0

2 years ago

Read 2 more answers

The x and y for 2x-8y=10

nirvana33 [79]

Answer:

x=13, y=2

Step-by-step explanation:

for this equation you can use a variety of solutions, but you have to choose one (obviously). if you substitute 2 for y, the equation will be 2x-16=10. to make this true, 2x must be equal to 26, so x will be 13 :)

3 0

3 years ago

A taxi is rented by a group of x people for $40 and the cost is shared equally. If there is one less person in the group then th

anzhelika [568]

Answer:

X = 5

Step-by-step explanation:

I think there a problem with the question, If there is one less person in the group then the payment by each remaining person is must more than $2 than the previous, because the rent cost unchanged but the number of people in the group decreased.

Before, cost per person : $\frac{40}{x}$

After cost per person: = $\frac{40}{x -1 }$

However, the payment by each remaining person is more than $2 than the previous, so

$\frac{40}{x -1 }$ = $\frac{40}{x}$ + 2

<=> $2x^{2}$ - 2x -40 = 0

<=> X = 5

3 0

3 years ago

Which sequence matches the recursive formula?

goldenfox [79]

Hello:
<span>an = 2an-1 + 5, where a1 = 5
n =2 a2 = 2a1 +5 = 2(5)+5 = 15
</span>n =3 a3 = 2a2 +5 = 2(15)+5 = 35
n =4 a4 = 2a3 +5 = 235)+5 = 75
answer :
<span>B)
5, 15, 35, 75, ...</span>

4 0

3 years ago

Read 2 more answers

Can someone please be a hero and help me on this please.

Paha777 [63]

Answer:

The answer is C

Step-by-step explanation:

8 0

3 years ago