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lara [203]
4 years ago
6

I need help!!!!!!!!!!!!!!!!!!!!!!

Mathematics
1 answer:
kherson [118]4 years ago
6 0

Answer:

29 multiple-choice questions

and 6 word problem questions

Step-by-step explanation:

let x be the number of multiple-choice questions

and y be the number of word problem questions

then:

x+y=35

2x+7y=100

x=35–y

2(35–y)+7y=100

70–2y+7y=100

70+5y=100

5y=100–70

y=30/5=6

since x+y=35

then x+6=35

then x=35–6=29

You might be interested in
The difference between two numbers is 5, and twice the smaller number is 18 more than the larger number. Find the numbers.
cupoosta [38]
Let's write it down in mathematical terms:

x-y=5
so
x=5-y

this means:difference between two numbers is 5

2y=x+18

this means: twice the smaller number is 18 more than the larger number
and we can substitute the x for what we said before:

2y=(5-y)+18

we add 1 y from each side:

3y=5+18

3y=23

so the smaller number is 23 and the bigger number is 23+5=28.




6 0
3 years ago
-2+7b-4b if you know please help
Agata [3.3K]

Answer:

3b-2

Step-by-step explanation:

6 0
3 years ago
Suppose Maria places $5500 in an account that pays 2% interest compound each year. Assume that no withdrawals are made from the
kykrilka [37]

Answer:

After 1 year:    $5,610

After 2 years: $5,722.20

Step-by-step explanation:

Use the formula for periodic compounding interest, which is

A = P(1 + r/n)^(nt), where A is the final amount, P is the initial deposit, r is the interest rate as a decimal, n is the number of times the interest is compounded per year, and t is how many years.

Here, P = 5,500, r = 0.02  (that's 2% as a decimal), n = 1,

t = 1 for the first answer, t = 2 for the second answer (1 year, then for 2 years)

Plug the known values in to solve...

For 1 year...

A = 5,500(1 + 0.02/1)^(1*1)

   A = 5,500(1.02)^1

      A = 5,610

For 2 years...

A = 5,500(1 + 0.02/1)^(1*2)

   A = 5,500(1.02)²

      A = 5,722.20

5 0
4 years ago
An equilateral triangle has a perimeter of 30x + 15. What is the length of each side of the triangle?
Ymorist [56]

Answer:

10x + 5

Step-by-step explanation:

length \: of \: each \: side \: of \: equilateral   \:  \triangle \\  =   \frac{perimeter}{3}  \\  \\  =  \frac{30x + 15}{3}  \\  \\  =  \frac{3(10x + 5)}{3}  \\  \\  = 10x + 5 \\

7 0
3 years ago
Are these two expressions equivalent? Use the
Rina8888 [55]

Answer:

No, they are not equivalent

Step-by-step explanation:

8x + 3(x + y)

8x + 3x + 3y

11x + 3y

7x + 7y + 4x + 4y

11x + 11y

They are not equivalent because in one of the equations, the like terms add up to 11y which is different from the other equation which adds up to 3y.

I hope this helps.

8 0
3 years ago
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