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2 years ago

Are the expressions x + x + 1 + x + 2 + x + 1 + x and 5x + 4 equivalent? Why or why not?

Mathematics

1 answer:

egoroff_w [7]2 years ago

3 0

Answer:

yes

they are equivalent because lets say the X = 3 then you would have to answer

3 + 3 + 1 + 3 + 2 + 3 + 1 + 3

and that would = 19

and then on the other equation

5 x 3 + 4 = 19

So the both equal the same.

PLZ MARK ME BRAINLIEST

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zloy xaker [14]

Add 5 to both sides to get x alone and you will have your answer which is x= -3

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3 years ago

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7. Define a variable and write an expression for the phrase.<br> 8 minus a number

xxTIMURxx [149]

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Let y = 3t + 6 be a linear function representing the distance from home for an ant t minutes after starting out from a location

ANEK [815]

For this case we have the following equation:

y = 3t + 6

Where we have the following variables:

t: time in minutes

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3 years ago

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O perímetro de um campo retangular é de 80 metros e sua area é de 320 metros quadrados. Encontre as dimensões do campo, corrija

dalvyx [7]

Answer:

Comprimento: 28.9 m; Largura: 11.1 m

Step-by-step explanation:

P = 2(C + L) = 80

A = CL = 320

2(C + L) = 80

CL = 320

C + L = 40

CL = 320

C = 40 - L

CL = 320

(40 - L)L = 320

40L - L^2 = 320

L^2 - 40L + 320 = 0

aL^2 + bL + c = 0

$L = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}$

$L = \dfrac{-(40) \pm \sqrt{(-40)^2 - 4(1)(320)}}{2(1)}$

$L = \dfrac{40 \pm \sqrt{1600 - 1280}}{2}$

$L = \dfrac{40 \pm \sqrt{320}}{2}$

$L = \dfrac{40 \pm \sqrt{64 \times 5}}{2}$

$L = \dfrac{40 \pm 8\sqrt{5}}{2}$

$L = 20 \pm 4\sqrt{5}$

$L \approx 28.9$ or $L \approx 11.1$

L = 28.9

C = 40 - L = 40 - 28.9 = 11.1

Answer: Comprimento: 28.9 m; Largura: 11.1 m

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3 years ago

A car drove for 20 minutes at a speed of 52 how far did it travel

laiz [17]

Answer:

Oerhaps 17.3333 miles, see assumption below

Step-by-step explanation:

There are no units for 52. 52 m/sec? 52 feet/min?, 52 mph?

Once we have the units for the 52, convert the 20 minutes to the same unit as in the speed unit, hours in this case. I'll assume miles/hour for the speed here. So convert 20 minutes into hours: (1 hr/60min)*(20 minutes) = (1/3) hour.

Now multiply by the 52 mph:

(52 miles/hr)*(1/3 hour) = (52/3) miles or 17.33 miles

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2 years ago