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Eduardwww [97]
2 years ago
8

Which equation has the same solution as 7x−14=21?

Mathematics
2 answers:
arsen [322]2 years ago
7 0

Yky. we'd to provide the other options but to do this you need to +14 to both side. 21+14 then -14+14 cancel. so it's now

7x=35 then you divide 7 in both sides 7 cancels 35/7 =5

x=5

laila [671]2 years ago
6 0

Answer:

2x=10

Step-by-step explanation:

7x-14=21

x=5

2x=10 (divide both sides by two)

2x/2  10/2

<u>x=5</u>

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What is the value of b?<br><br> ​0.4(3b+10)=19
Sergio039 [100]

Answer:

12.5

Step-by-step explanation:

Step 1:

0.4 ( 3b + 10 ) = 19     Equation

Step 2:

1.2b + 4 = 19       Multiply

Step 3:

1.2b = 15    Subtract 4 on both sides

Step 4:

15 ÷ 1.2    Divide

Answer:

b = 12.5

Hope This Helps :)

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3 years ago
How many solutions does this system have? PLEASE DON’T GET THIS WRONG
Lemur [1.5K]

Answer:

A one solution I hope that help

6 0
3 years ago
Laura drove 638 miles in 11 hours at the same rate how long would it take her to drive 406 miles
shusha [124]

Answer:

Step-by-step explanation:

This is a d = rt problem; but since it is linear, then proportions will work too. Set up the proportion with miles on top and hours on the bottom:

\frac{miles}{hrs}:

Then put the numbers in where they go, keeping in mind that miles goes with miles and hours goes with hours in the ratios, and that our unknown is time (hours):

\frac{miles}{hrs}:\frac{638}{11}=\frac{406}{x} and cross multiply to solve:

638x = 4466 so

x = 7 hrs

6 0
2 years ago
Find the area of quadrilateral KLMN​
WITCHER [35]

Step-by-step explanation:

I just answered this ...

the first thing we notice : the quadrilateral has 2 pairs of equally long sides with 2 angles being openly 90°.

so, we are dealing with a rectangle here.

we know that one pair of the sides (NK = LM) are 24 cm long.

and we know that KL:LM = 3:4.

that means that the pair KL = MN are the shorter sides of the rectangle. and their length is according to the ratio 3/4 of NK=LM.

3/4 × 24 = 18 cm

the area of that rectangle is therefore

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Step-by-step explanation:

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