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3 years ago

-8(2x) + 5(2x - 12) + -2(5y - 2) + (-3) (3y)

Mathematics

2 answers:

zvonat [6]3 years ago

8 0

Answer:

−6x−19y−56

Step-by-step explanation:

−8(2x)+5(2x−12)+−2(5y−2)+(−3)(3y)

Multiply −8 and 2 to get −16. Multiply −3 and 3 to get −9.

−16x+5(2x−12)−2(5y−2)−9y

Use the distributive property to multiply 5 by 2x−12.

−16x+10x−60−2(5y−2)−9y

Combine −16x and 10x to get −6x.

−6x−60−2(5y−2)−9y

Use the distributive property to multiply −2 by 5y−2.

−6x−60−10y+4−9y

Add −60 and 4 to get −56.

−6x−56−10y−9y

Combine −10y and −9y to get −19y.

−6x−56−19y

KonstantinChe [14]3 years ago

6 0

Answer:

-6x - 19y - 56

Step-by-step explanation:

<u>Simplify</u>:

-8(2x) + 5(2x - 12) + -2(5y - 2) + (-3) (3y) =
-16x + 10x - 60 - 10y + 4 - 9y =
x(-16 + 10) + y(-10 - 9) + (-60 + 4) =
x(-6) + y(-19) + (-56) =
-6x - 19y - 56

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Elena L [17]

Answer:

x=-2

Step-by-step explanation:

4+8x=-12

-4 -4

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/8 /8

x = -2

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Jeremy wants to give a 20% gratuity to his cab driver. His fare is $35.50. What is the total amount he will pay the driver?

Mandarinka [93]

Answer: $42.60

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The equation y=9. 5x 0. 4 represents the line of best fit for the distance (in feet) that Marcella traveled over time (in second

Bas_tet [7]

The average speed of Marcella in feet per seconds is 9.5 feet per second.

<h3>How are time taken for travel, distance traveled, and the average speed are related?</h3>

We have this below shown relation between them

$\text{Average speed} = \dfrac{\text{Distance traveled}}{\text{Total time taken to travel that distance}}\\\\or\\\\\text{Total time taken to travel that distance}= \dfrac{\text{Distance traveled}}{\text{Average speed} }$

For the given case, we have:

The equation $y=9.5x + 0.4$ represents the line of best fit for the distance (in feet) that Marcella traveled over time (in seconds)

The line of best fit can be taken as approximately telling about the data points ( y = distance traveled in feet, and x = time spent )

Let the initial time be 'x' with initial distance traveled 'y', then the time after one second will be (x+1), and the distance traveled be $y_1$

The value of y and $y_1$ are calculated as:

$y = 9.5x + 0.4\\y_1 = 9.5(x+1) + 0.4 = 9.5x + 9.9$

Thus, the average speed is calculated at time 'x' as:

$\text{Average speed} = \dfrac{\text{Distance traveled}}{\text{Total time taken to travel that distance}}\\\\or\\\\\text{Average speed} = \dfrac{y_1 - y}{x + 1 - x} = \dfrac{9.5x + 9.9 - 9.5x - 0.4}{1} = 9.5 \: \rm feet/sec$

We could've also used the fact that in the relation of y to x as $y = mx + c$ , 'm' denotes the rate of y as x changes.

Thus, the average speed of Marcella in feet per seconds is 9.5 feet per second.

Learn more about average rate here:

brainly.com/question/12322912

4 0

1 year ago

15 Points and ill mark brainliest!

natima [27]

Neat
of turf, 83.33333% of the 1050 were minor
so about 875 minor injuries in turf
and 10.857% of 1050 were substantial meaning about 114 substantial
leaving 63 severe field turf

meaning 938 minor in gras (totalminior-minorturf=grassminor)
so now we know that grassmionr=938 that that is 1
and hen that is 77.972 gras is mionr so 938=77.972%
1203 total gras
then 4.26 of gras is severe or about 51
and leaving about 217 substantial gras injuries
total them yourself
I have to go sorry bye hope this helped

7 0

2 years ago

Conjunction and disconjuction

maks197457 [2]

Step-by-step explanation:

When two statements are connected with an 'and,' you have a conjunction.

For conjunctions, both statements must be true for the compound statement to be true.

When the connector between two statements is "or," you have a disjunction. In this case, only one statement in the compound statement needs to be true for the entire compound statement to be true.

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2 years ago