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Eduardwww [97]
3 years ago
13

Help me please thanks

Mathematics
1 answer:
Brut [27]3 years ago
3 0
Forget about the negative sign. First you have to find a least common denominator. This would be 63. Since we had to multiply 9 by 7 to get 63 we have to multiply the numerator (4) by 7. This gives us a new fraction of 36/63. Since we ha e to multiply 21 by 3 to get 63 we have to multiply 19 by 3. This gives us 57. So now we have 36/63 and 57/63. Then we add the negative sign back in making 57/63 -57/63. Now we add them together. Because one has a negative sign and one is positive the number has to be closer to zero. So the answer is -21/63.
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A 4 3/4-foot pipe has a 3 1/4-foot pipe fitted to it. How long is the new pipe?
lesantik [10]
1/4 is the anwers because you need to reduce the fraction
3 0
3 years ago
Read 2 more answers
What is an<br> equation of the line that passes through the points (-4, -1) and (3,-8)?
Kaylis [27]

Answer:

y=-x-5

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(-8-(-1))/(3-(-4))

m=(-8+1)/(3+4)

m=-7/7

m=-1

y-y1=m(x-x1)

y-(-1)=-1(x-(-4))

y+1=-1(x+4)

y+1=-x-4

y=-x-4-1

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Please mark me as Brainliest if you're satisfied with the answer.

6 0
3 years ago
$800 at 7% compounded annually for 2 years
Marina86 [1]

Answer:

$115.92

Step-by-step explanation:

To calculate compound interest, which Amount - Principal but we dont know the value for amount so we find the amount first by using the formula.

               A =  P ( 1 +   <u>R</u> ) ^n

                                 100      

where p = principal    ($800)            

a =  amount       (?)

r =  interest rate    (7%)

n = time ( no of years)    (2)

A  =  800   ( 1   +   <u>7 </u>) ^2

                          100                  A = 800 ( 1 + 0.07) ^2

                                                  A = 800 ( 1.07)^2   = 800 ( 1.1449)

A = 915.92.

We then find compound interest with:    

C = Amount - Principal   =   $915.92  -  $800    =    $115.92

7 0
2 years ago
Courtney walks 5 laps around 1/4 mile track. how far does she walk?
zhuklara [117]

Answer:

1 1/4 miles

Step-by-step explanation:

4 0
3 years ago
Find the surface area<br> Will give brainliest to first answer!!!!
user100 [1]
120 I think I’m not sure
7 0
2 years ago
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