Simplify 18 - 2[x + (x - 5)].
8 - 4x
28 - 4x
28 - 2x

Answers

Answer 1

Answer: 18 - 2[x + x - 5]

18 - 2[2x - 5]

18 - 4x + 10

28 - 4x

Your answer is 28 - 4x.

Answer 2

Answer: $18 - 2[x + (x - 5)] \n \n 18 - 2(x + x - 5) \n \n 18 - 2(2x - 5) \n \n 18 - 4x + 10 \n \n -4x + 28 \n \n Answer: \fbox {-4x + 28}$

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Solve the system.x – 2y = 10
3x + 2y = 14

(Points : 5)
(–8, 6)
(–2, 6)
(6, –8)
(6, –2)

Answers

$x - 2y = 10\n 3x + 2y = 14\n ------\n 4x=24\n x=6\n\n 6-2y=10\n 2y=-4\n y=-2\n\n (6,-2)$

Solve the inequality
-5a-12<-18

Answers

- 5a - 12 < -18

Add 12 to each side:

-5a < -6

Divide each side by 5 :

-a < -1.2

a > 1.2

$-5a-12 < -18\ \ \ /+12\n\n-5a < -6\ \ \ \ /:(-5) < 0\ \then\ change\$

A certain test is worth 155 points. How many points (rounded to the nearest point) are needed to obtain a score of 65%?

Answers

$65\%=(65)/(100)=0.65\n\n65\%\ of\ 155\to0.65*155=100.75\approx101$

The Nguyen family spent $48 on entrance fees to the county fair. Each ticket for an adult cost $12. Each ticket for a child cost $5. Each senior citizen paid $2. There were six people in the group. There were 2 fewer tickets purchased for senior citizens than adult tickets. How many adult tickets were purchased?

Answers

i wanna say 3 but not sure

Solve 4^(2x) = 7^(x−1).

Answers

To solve for x in the given equation, use natural logarithms. Getting the natural logarithms of both sides, will be ln 4^(2x) = ln 7^(x-1). This is also equal to 2x ln 4 = (x-1) ln 7. Rearranging the equation, 2x/(x-1) = ln 7/ln 4. The right side is equal to 1.4037. Thus, the value of x is -2.3539.

What is the value of y