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den301095 [7]
3 years ago
12

Jessica can build a bookshelf in 4 hours. Sydney can build a bookshelf in 6 hr. How long will it take them if they build the boo

kshelf together?
Mathematics
2 answers:
Dominik [7]3 years ago
4 0

Answer:

2 hours

Step-by-step explanation:

i think

Furkat [3]3 years ago
4 0

Answer:

About 2.4 Hours

Step-by-step explanation:

1/4+1/6=1/h

12h(1/4+1/6)=12h(1/h)

3h+2h=12

5h=12

12/5=2.4

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171 / 7.6 = 22.5 miles per gallon

22.5 x 12.5 = 281.25 miles she can drive

7 0
2 years ago
Read 2 more answers
2.3*10^8+4.7*10^7<br><br> Express answer in scientific notation.
juin [17]

Answer:

2.3 * 80 + 4.7 * 70

Step-by-step explanation:

6 0
3 years ago
Solving systems of equations using substitution y=2x Y=-2x-4 X= Y=
podryga [215]

Answer:

hope this helps

Step-by-step explanation:

y=2x

y=-2x-4

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im sorry but im not sure what y is

6 0
2 years ago
You will get 10 points! thanks
Marianna [84]

Answer: y=-1/6x+2

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7 0
2 years ago
The law of cosines is used with oblique triangles true or false?
I am Lyosha [343]

That's true; the Law of Cosines works with all triangles. With right triangles it simplifies to the Pythagorean Theorem.



5 0
2 years ago
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