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3 years ago

What is 7(x + 3) please help meeeee PLEASE IM RUNNING OUT OF TIME

Mathematics

2 answers:

AleksandrR [38]3 years ago

7 0

The answer would be 7x+21
7 • x = 7x and 7 • 3 =21

Gennadij [26K]3 years ago

5 0

Answer:

The answer is 7x+21

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Jackson went into a movie theater and bought 8 bags of popcorn (x) and 2 candies (y), costing a total of $58. Cooper went into t

Sophie [7]

Answer:

(a)

$8x + 2y = 58$

$4x + 5y = 49$

(b)

Bag of popcorn = $6

Candy = $5

Step-by-step explanation:

Given

$candy = y$

$popcorn = x$

Jackson: x = 8; y= 2; Total = 58

Cooper: x = 4; y= 5; Total = 49

Solving (a): System of equation

For Jackson:

$8x + 2y = 58$

This is done by multiplying each variable by the quantity.

Same will be applied to Cooper's purchase:

Cooper:

$4x + 5y = 49$

Solving (b): Price of 1 bag of popcorn and 1 candy

This implies that we solve for x and y

$8x + 2y = 58$ ----- (1)

$4x + 5y = 49$ -------- (2)

Multiply the second equation by 2

$2(4x + 5y = 49)$

$8x + 10y = 98$ -------- (3)

Subtract the (1) from (3)

$8x - 8x + 10y - 2y = 98 - 58$

$10y - 2y = 98 - 58$

$8y = 40$

Solve for y

$y = 40/8$

$y = 5$

Substitute 5 for y in (1)

$8x + 2y = 58$

$8x + 2 * 5 = 58$

$8x + 10 = 58$

$8x = 58 - 10$

$8x = 48$

Solve for x

$x = 48/8$

$x = 6$

This implies:

Bag of popcorn = $6

Candy = $5

4 0

3 years ago

Anyone can help me with this?

djverab [1.8K]

It’s number 4 because 1-3 aren’t on the left side

5 0

3 years ago

Read 2 more answers

Given the following points from a quadratic equation, {(-1,1),(0,-2),(1,-3),(2,-2),(3,1)} Find the rate of change between (-1,1)

HACTEHA [7]

B undefined it is not constent

4 0

3 years ago

N employee earns $175 for 15 hours work. assuming he is paid by the hour, how much will this employee earn in 18 hours?

alekssr [168]

First you would divide 175 by 15 and get 11.6666666667, you would then multiply that by 18 amd get 210.0000000001

7 0

3 years ago

Louisa ran at an average speed of five miles per hour along an entire circular park path. Calvin ran along the same path in the

docker41 [41]

Answer:

15 miles

Step-by-step explanation:

Let $x$ be the miles in the circular park path, $t_{L}$ the time Louisa takes to finish and $t_{C}$ the time Calvin takes to finish both in hours.

Then $x$ , the longitude is equal to the velocity times the time used to finish. So

$x=5t_{L}$

$x=6t_{C}$

And the difference between Louisa's time and Calvin' time is 30 minutes, half an hour. So:

$t_{C}=t_{L}-0.5$

Three equations, three unknowns, the system can be solved.

Equalizing the equation with x :

$5t_{L}=6t_{C}$

In this last equation replace $t_{C}$ with the other equation and solve:

$5t_{L}=6(t_{L}-0.5)\\ 5t_{L}=6t_{L}-3\\ 3=6t_{L}-5t_{L}\\ 3=t_{L}\\ t_{L}=3$

With Louisa's time find x:

$x=5t_{L}\\ x=5(3)\\ x=15$

7 0

3 years ago