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Serhud [2]
3 years ago
15

If AB = 9 and BC = 12 then what is AC?

Mathematics
2 answers:
dimaraw [331]3 years ago
4 0

Answer:

AC = 12 cm

Step-by-step explanation:

AB=9 centimeters, you figure out what times what is 9. in this case, it is 3 for A and B. Then you go to BC=12 and 3 for B and 4 for C making it 12 So AC would equal 3x4.

kykrilka [37]3 years ago
3 0
AC = 21

Assuming this is on a line segment AC would be the full length of the line segment that you are trying to find and point B would be splitting in between.
So if the distance between AB is 9 and the distance between BC is 12 then you just add them up the get the full length of AC which is 21
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4x/5 - 3x/7 = 4x/7 + 5x/7 can anyone please help with explanation...​
kirill115 [55]

Answer: x=0

Step-by-step explanation:

Multiply both sides of the equation by 35, the least common multiple of 5,7.

7×4x−5×3x=5×4x+5×5x

Multiply 7 and 4 to get 28.

28x−5×3x=5×4x+5×5x

Multiply −5 and 3 to get −15.

28x−15x=5×4x+5×5x

Combine 28x and −15x to get 13x.

13x=20x+25x

Combine 20x and 25x to get 45x.

13x=45x

Subtract 45x from both sides

13x−45x=0

Combine 13x and −45x to get −32x

−32x=0

Product of two numbers is equal to 0 if at least one of them is 0. Since −32 is not equal to 0, x must be equal to 0.

X=0

7 0
3 years ago
Solve for y: 1/3y+7≥12<br><br> A) y ≤ 5/3<br> B) y ≥ 15<br> C) y ≤ 5<br> D) y ≥ 57
Klio2033 [76]

Answer:

B) y ≥ 15

Step-by-step explanation:

6 0
3 years ago
Question 26 teresa runs 3 miles in 28 minutes. at the same rate, how many miles would she run in 42 minutes?
Leya [2.2K]
The answer is 4.5 miles. Hope it helps!
8 0
3 years ago
Is the expression x3•x3•x3 equivalent to x3•3•3? Why or why not? Explain your reasoning.
devlian [24]

no they are different

if Base are equal power are added

like wise in first expressions power are added

but in second expressions cube of three is written as x to the power.

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3 0
3 years ago
Working his way through school, Joe works two part-time jobs for a total of 18 hours a week. Job A pays $5.70 per hour, and Job
ad-work [718]

Answer:

A = 14.2/1.1 hours

B = 5.091 hours

Step-by-step explanation:

Formulate 2 simultaneous equations

5.7A + 6.8B = 111.40..........(1)

A +B =18...............................(2)

Multiply each item in (2) by 5.7 to get

5.7A + 5.7B = 97.2............(3)

subtract (1) - (3) on each side

5.7A -5.7A + 6.8B - 5.7B = 111.40 -97.2

1.1B = 14.2

B = 14.2 /1.1

to get A use equation (2)

A = 18 - B

A = 18 - 14.2/1.1 = 5.091

4 0
3 years ago
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