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4 years ago

What value of x makes this equation true?

Mathematics

1 answer:

Alex73 [517]4 years ago

4 0

Answer:

$x=9/4=2.25$

Step-by-step explanation:

The model is essentially saying:

$3(-x)+10(1)=5(x)+8(-1)$

Simplify:

$-3x+10=5x-8$

Subtract 5x from both sides:

$-8x+10=-8$

Subtract 10 from both sides:

$-8x=-18$

Divide both sides by -8. The negatives cancel:

$x=18/8$

Reduce:

$x=9/4=2.25$

And we're done!

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What is the solution to this equation?

Komok [63]

Answer:

B. x=75

Step-by-step explanation:

First, write out the equation as you have it:

x/5=15

Then, multiply both sides of the equation by 5/1:

5/1(x/5)=15(5/1)

Your result is:

x=75

5 0

3 years ago

Help a little friend out? :)

frez [133]

ok first off ur not my little friend lol and ur answer should be 996.31 sorry if its wrong i tried <3

7 0

3 years ago

Sullivan and Carter both went trick or treating in the neighborhood, and now they're

TEA [102]

Answer:

Carter had twice the candy that Sullivan has.

Step-by-step explanation:

3 0

3 years ago

One sample has a mean of M= 6, and a second sample has a mean of M = 12. The two samples are combined into a single set of score

lakkis [162]

Answer:

a) 9

b) 10

c) 8

Step-by-step explanation:

We are given the following in he question:

Mean of sample A = 6

Mean of sample B = 12

Formula:

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$\dfrac{\displaystyle\sum x_a}{n_a} = 6\\\\\dfrac{\displaystyle\sum x_b}{n_b} = 12$

a) original samples have n = 4 scores

$\dfrac{\displaystyle\sum x_a}{4} = 6,\sum x_a = 24\\\\\dfrac{\displaystyle\sum x_b}{4} = 12,\sum x_b = 48\\\\\text{Combined mean} = \displaystyle\frac{\sum x_a + \sum x_b}{4+4}=\frac{24 + 48}{4 + 4} = 9$

b) first sample has n = 3 and the second sample has n = 6

$\dfrac{\displaystyle\sum x_a}{3} = 6,\sum x_a = 18\\\\\dfrac{\displaystyle\sum x_b}{6} = 12,\sum x_b = 72\\\\\text{Combined mean} = \displaystyle\frac{\sum x_a + \sum x_b}{3+6}=\frac{18+72}{3+6} = 10$

c) first sample has n = 6 and the second sample has n = 3

$\dfrac{\displaystyle\sum x_a}{6} = 6,\sum x_a = 36\\\\\dfrac{\displaystyle\sum x_b}{3} = 12,\sum x_b = 36\\\\\text{Combined mean} = \displaystyle\frac{\sum x_a + \sum x_b}{6+3}=\frac{36+36}{6+3} = 8$

7 0

3 years ago

If 1 liter = 1.057 quarts, how many quarts are in 1 kiloliter

andrezito [222]

<span>If 1 liter = 1.057 quarts, how many quarts are in 1 kiloliter?
1KL X (1L/1000KL) X (1.057quarts/1L) <<< use a calculator
I hope I helped! :)</span>

7 0

4 years ago

Read 2 more answers