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FromTheMoon [43]
3 years ago
10

Your friend is purchasing an umbrella with a slant height of 4 feet. There are a variety of such umbrellas to choose from.

Mathematics
1 answer:
Dafna1 [17]3 years ago
7 0
C but confirm it with your teacher
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Right now Seth's age is 4/5 the age of his brother Eric. Twenty-one years ago, Eric was twice as old as Seth. What are their age
lana [24]

Answer:

          Present Time                                                                

Let X= Eric's age                                                            (4/5)X= Seth's age

Question:  What are their ages now?________________________________________________________________________

                                             Past (21 years ago)

X-21 =Eric's age                                                                (4/5)X-21=Seth's age

2*[4/5(X-21]=Eric's age

Therefore, X-21= 2*[4/5(X)-21]=Eric's age           Substitution

_______________________________________________________________________

X-21= 8/5 X  - 42         Solve for "X" by adding 42 to both sides.

X-21+42=(8/5) X

X+21 = (8/5)X              Subtract "X" from both sides.

21=(3/5)X                    Multiply both sides of equation by reciprocal of (3/5), which is 5/3

21*(5/3)= X                  Finish the problem to find value of "X," which is Eric's age.  

                                   Then find  4/5 (X)= Seth's age  

8 0
2 years ago
Read 2 more answers
A cab ride from your home to the airport cost $23.47. If you want to tip the cab driver close to 10 percent of the fare, how muc
Anna71 [15]

To find 10% of a number, move the decimal point one place to the left.

$23.47 becomes $2.347

The closest answer is C $3

8 0
2 years ago
Is the sum of 4.2 and the square root of 2 rational or irrational?
andrew-mc [135]
A rational number can be expressed as a fraction with an integer numerator and denominator. The square root of 2 is irrational, and adding 4.2 doesn't change this, since there are no integers that, when divided, form this sum.
4 0
3 years ago
Simplify the expression -3(x+3)+4x
Korolek [52]

Answer:

x - 9

Step-by-step explanation:

In this case, "simplify" directs that you 1) carry out the indicated multiplication and 2) combine like terms.

-3(x+3)+4x = -3x - 9 + 4x = x - 9

8 0
2 years ago
Read 2 more answers
There are 87 first graders in after care.after 39 students are picked up, the teacher put the remaining students into 4 groups f
Elden [556K]

Answer:

There are 12 students in each group

Step-by-step explanation:

87-39= 48

48/4= 12

Hope this helped. ;)

5 0
3 years ago
Read 2 more answers
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