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2 years ago

Blank subtract 3/8 equals to 3/4

Mathematics

1 answer:

RideAnS [48]2 years ago

7 0

Answer:

x-3/8=3/4, (do inverse operation)x-3/8=6/8, x= 9/8

Step-by-step explanation:

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Five years ago I was 5 times older than my son. In 8 years’ time I will be 3 times older than my son. How old am I today?

o-na [289]

Let x = Parent's age now y = son's age now

Then, x-5 = parent's age five years ago

y-5 = son's age five years ago

So, x-5 = 5(y-5)

Simplify to get x - 5y = -20

Parent's age 8 years from now = x+8

Son's age 8 years from now = y+8

So, x+8 = 3(y+8)

Simplifying, we have x - 3y = 16

We have the system of equations: x - 5y = -20

x - 3y = 16

Subtract the equations to obtain -2y = -36

y = 18

x = 70

Parent is 70 years old and the son is 18 years old.

6 0

2 years ago

Read 2 more answers

Emily and her children went into a grocery store and she bought $20.80 worth of bananas and peaches. Each banana costs $0.80 and

MakcuM [25]

Answer:

The number of bananas that Emily bought was 6 and the number of peaches that Emily bought was 8

Step-by-step explanation:

<u><em>The complete question is</em></u>

Emily and her children went into a grocery store and she bought $20.80 worth of bananas and peaches. Each banana costs $0.80 and each peach costs $2. She bought a total of 14 peaches and bananas altogether. Determine the number of peaches and the number of bananas that Emily bought

Let

x ----> the number of bananas that Emily bought

y ----> the number of peaches that Emily bought

we know that

She bought a total of 14 bananas and peaches altogether

$x+y=14$ -----> equation A

She bought $20.80 worth of bananas and peaches

$0.80x+2y=20.80$ -----> equation B

Solve the system by graphing

Remember that the solution is the intersection point both graphs

using a graphing tool

The solution is the point (6,8)

see the attached figure

therefore

The number of bananas that Emily bought was 6 and the number of peaches that Emily bought was 8

3 0

3 years ago

I really need help I’m very confused

Vaselesa [24]

Answer:

10: -11n^5

12: 6k^2 -6k+7

Step-by-step explanation:

Ok so what your gonna do is add or subtract the ones with the same exponent.

so -15+4= -11 since they are both n^5 you can add them so your answer is:

-11n^2

now you have 8k^2-k-5k+7-2k. so you are gonna rearrange them so the same exponents are together.(keep the sign in front in front, if no sign it is positive)

8k^2-2k^2-5k-k+7

add like exponents

6k^2-6k+7

6 0

3 years ago

What is 4 4/5 + 1 1/3?

Dafna1 [17]

Answer:

$\frac{92}{15}$