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4 years ago

2(x-5)+3x=x+6 A)x=0 B)x=4 C)x=-1 D)x=2

Mathematics

1 answer:

alexgriva [62]4 years ago

4 0

The answer would be letter B

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Two skateboarders, Ron and Bob, are traveling in opposite directions.Ton travels at 8 feet per second and bob travels at 10 feet

omeli [17]

Time taken before they are 2640 feet is 146.67 seconds

Solution:

The distance is given by formula:

$distance = speed \times time$

Ton travels at 8 feet per second

Let us assume, time taken = t

speed = 8 feet per second

Then, distance is given as:

Distance covered by Ton = 8t

Bob travels at 10 feet per second

Then, distance is given as:

Distance covered by Bob = 10t

How long will it take before they are 2640 feet

Which means,

Distance covered by Ton + Distance covered by Bob = 2640

$8t + 10t = 2640\\\\18t = 2640\\\\Divide\ both\ sides\ of\ equation\ by\ 18\\\\t = 146.67$

Thus time taken before they are 2640 feet is 146.67 seconds

<h3>Method 2:</h3>

Since trains are moving in opposite directions, their speeds must be added

speed = 8 + 10 = 18 feet per second

Given distance = 2640 feet

Therefore, time taken is:

$time = \frac{distance}{speed}\\\\time = \frac{2640}{18} = 146.67 \text{ second }$

Thus time taken before they are 2640 feet is 146.67 seconds

4 0

4 years ago

Find the solution to the system of equations.

kramer

Answer:

x = 1

y = -4

Step-by-step explanation:

y = -x - 3

y + 3 = -x

x = - y - 3

y = -7(-y - 3) + 3

y = 7y + 21 + 3

y = 7y + 24

-6y = 24

y = -4

-4 = -x - 3

-1 = -x

x = 1

8 0

3 years ago

The ratio of the surface areas of 2 rectangles is 256:484. What is the ratio of their heights?

exis [7]

Answer:

182:242

Step-by-step explanation:

Reduce the ratio by its halves (50 percent) and simplify.

Although for this case, you could reduce it even further, because this is a ratio, not the true height.

If this is a test, I would not recommend that.

3 0

3 years ago

Which equation is the universe of y=9x^2-4

Sladkaya [172]

Step-by-step explanation:

keep in mind that, to get the inverse expression of any relation, we start off by doing a quick switcheroo on the variables, and then solve for "y", so let's do so,

5 0

3 years ago

Read 2 more answers

What does the outer ear do?

joja [24]

Answer:

the outer it gathers or accepts the sound directing it toward the eardrum

Also if this answer helps you can I get brainilist please

5 0

3 years ago