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2 years ago

Solve for x. 7 - (2x + 11) + 3(3 - x) = 20

Mathematics

2 answers:

zvonat [6]2 years ago

7 0

Answer:

your answer should be x = -3

Amanda [17]2 years ago

7 0

Answer:

x=-3

Step-by-step explanation:

7-2x-11+9-3x=20

5-5x=20

-5x=15

x=-3

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Each day, Kyle reads 30 pages of a 450-page book. Write a linear equation to represent the number of pages Kyle has left to read

Natalija [7]

Answer:

y=-30x+450

if she reads 30 pages every day it will take 15 days

6 0

3 years ago

Select all the points that are on the line through (0 5) and (2 8) A.(5 11) B.(5 10) C.(6 14) D.(30 50) E.(40 60)

mihalych1998 [28]

Answer:

Options C. and D. are correct.

Step-by-step explanation:

Let $(x_1,y_1)=(0,5),\,(x_2,y_2)=(2,8)$

Equation of a line is given by $y-y_1=(\frac{y_2-y_1}{x_2-x_1})(x-x_1)$

$y-5=(\frac{8-5}{2-0})(x-0)\\\\y-5=\frac{3}{2}x\\\\2y-10=3x\\3x-2y+10=0$

Put $(x,y)=(5,11)$

$3(5)-2(11)+10=15-22+10=3\neq 0$

Put $(x,y)=(5,10)$

$3(5)-2(10)+10=15-20+10=5\neq 0$

Put $(x,y)=(6,14)$

$3(6)-2(14)+10=18-28+10=0$

Put $(x,y)=(30,50)$

$3(30)-2(50)+10=90-100+10=0$

Put $(x,y)=(40,60)$

$3(40)-2(60)+10=0\\120-120+10=10\neq 0$

So, points $(6,14),\,(30,50)$ satisfy the equation $3x-2y+10=0$

Therefore,

points $(6,14),\,(30,50)$ lie on the line through $(0,5)$ and $(2,8)$

Options C. and D. are correct.

8 0

3 years ago

Benecio worked 40 hours at his two jobs last week. He earned $20 per

miv72 [106K]

Answer:

25 hours on his week job and 15 hours on his weekend job

Steps

20 times 25 is 500 for pay

18 times 15 is 270 for pay

Just add them

500 plus 270 equals 770 for pay

And 15 plus 25 is 40 total in hours

7 0

3 years ago

HELP, EXTRA POINTS AND BRAINIEST UMM DONT GUESS AND "NO NO NOOO LINKS" ty

3241004551 [841]

Answer:

236.3 feet squared.

Step-by-step explanation:

Base Surface Area = 8 squared

= 64 feet squared

Lateral Surface Area =

2×8× √

( 8 )2 + 102

= 172.3 feet sqaured

Total Surface Area = 236.3 feet squared

Please brainliest! I worked so hard!

7 0

2 years ago

A rectangle has a perimeter of 48 ft. The length and width are scaled by a factor 1.5.

prohojiy [21]

Answer: 75

Step-by-step explanation:

when increased in scale,

both sides are multiplied by the factor which is 1.5.

72 =1.5(2L+2W)

Mark me as brainliest

7 0

3 years ago