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Tasya [4]
3 years ago
13

Find the value of x in this equation use inverse operations and explain step by step

Mathematics
1 answer:
Galina-37 [17]3 years ago
5 0
42 = -6 + 3x
42 = 3x - 6      (just moving 3x and -6 around)
42+ 6 = 3x - 6 + 6     (adding 6 to both sides)
42 = 3x    
42/3 = 3x/3    (dividing by 3 to both sides to isolate for x)
14 = x

You're trying to isolate for x, so you have to get it alone on one side. To do this you have to add/subtract and multiply/divide, but remember that whatever you do to one side you have to do to the other. Hope this helped! :)
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Use cross products to determine whether the pair of ratios 4/6 and 14/21 form a proportion. Write yes or no. *SHOW WORK*
Dafna1 [17]
4/6 can reduce to 2/3. (divide each by 2)
14/21 can reduce to 2/3 by dividing the nume/denominator by 7.
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3 0
3 years ago
What us 81 percent of 62
Travka [436]
Steps:
1. Do a proportion
X/62= 81/100
2. Do 81 times 62 which is 5,022
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5 0
3 years ago
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Simplify the algebraic expression. -2(x - 5) + 4(9 + x)
AnnZ [28]

Answer:

2x+46

Step-by-step explanation:

-2(x-5)+4(9+x), Multiply

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Simplified= 2x+46

5 0
3 years ago
A bag contains 42 red marbles, 6 white marbles, and 8 gray marbles. You randomly pick out a marble, record its color, and put it
Elanso [62]
For any single draw,

\mathbb P(\text{white})=\dfrac6{42+6+8}=\dfrac6{56}
\mathbb P(\text{gray})=\dfrac8{42+6+8}=\dfrac8{56}

Drawing a white marble or a gray marble are disjoint events; only one of them can happen. So

\mathbb P(\text{white or gray})=\mathbb P(\text{white})+\mathbb P(\text{gray})-\underbrace{\mathbb P(\text{white and gray})}_0
\mathbb P(\text{white or gray})=\dfrac6{56}+\dfrac8{56}=\dfrac{14}{56}

Out of 224 draws, you should expect \dfrac{14}{56}\times224=56 of the marbles to be either white or gray.
6 0
3 years ago
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Need helps !!!!!!!!!!
Ilya [14]
Its A hope this helped 100% correct
7 0
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