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2 years ago

If someone drove 640 miles in 4 hours how would you determine they would travel in 12?

Mathematics

1 answer:

NISA [10]2 years ago

3 0

Answer:

Step-by-step explanation:

if someone drove 640 miles in 4 hours,

, it means that they drove 640/4=160 miles per hour

in 12 hours

160*12=1920

640............................4 h

640*3.........................4*3 hours

which give syou the same answer

1920.............................12 hours

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What is decimal expansion?

laila [671]

Rational numbers and decimal expansions. Posted on September 7, 2008 by Brent. As you may remember from school, rational numbers have a terminating or eventually repeating decimal expansion, whereas irrational numbers don't.

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2 years ago

Jennifer earns $39 for 6 hours of babysitting.how much will she earn for 10 hours

nadya68 [22]

Find the unit rate.

39/6 = 6.5

$6.50 an hour

multiply this by ten to find the cost for 10 hours

$6.5 x 10 = $65

she will earn $65 in ten hours.
hope this helps! :D

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3 years ago

Read 2 more answers

Pls solve will give like and brainiest

xenn [34]

Answer:

25/9
Explain:

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2 years ago

-4x-7+10x=-7+6x−4x−7+10x=−7+6xminus, 4, x, minus, 7, plus, 10, x, equals, minus, 7, plus, 6, x Choose 1 answer: Choose 1 answer:

EleoNora [17]

Answer:

(Choice C) C Infinitely many solutions.

Step-by-step explanation:

First of all, let us learn about solutions of linear equations in one variable.

The linear equations in one variable usually have one solution.

For example:

$2x =x+3$

When we solve this:

$2x-x=3\\\Rightarrow x=3$

One solution is $x = 3$

But there can be situations when there are

1. No solutions:

For example:

$x =x+9$

It means that value x is equal to value of x+9 which can never be true.

Truth is the term on Right Hand Side is always 9 greater than the value of Left Hand Side.

Such situations are called Contradictions.

Here, no solution exists.

2. Infinitely many solutions:

For example:

$x+2x+8=3x+8$

The Right hand Side is just the simplification of the LHS.

And LHS is always equal to RHS no matter what is the value of variable $x$ .

It means there are infinitely many solutions for this equation.

-----------------------------------------------------

Now, let us have a look at the given equation in the question:

$-4x-7+10x=-7+6x$

Taking LHS: $-4x-7+10x$

Taking the terms with $x$ on one side:

$-7+10x-4x\\\Rightarrow -7+6x$

which is equal to Right Hand Side.

Hence, as we discussed in case 2 above.

For every value of $x$ the equation holds true.

$\therefore$ There exists infinitely many solutions to the given equation.

Correct answer is:

(Choice C) C Infinitely many solutions

8 0

3 years ago

suppose that a player can run at a speed of 15 miles per hour. how many second will it take for the player to run from one corne

kvv77 [185]

answer

15 seconds

set up distance equation

to find the shortest distance between corners, we can use the Pythagorean theorem $a^2 + b^2 = c^2$

a is the width or 160 feet

b is the length or 300 feet

find distance

plug in values to find c, the distance

$a^2 + b^2 = c^2$

$160^2 + 300^2 = c^2$

115600 = $c^2$

c = $\sqrt{115600}$

c = 340 feet

set up time equation

to find the time it takes to run from corner to corner, we can use the equation

$time = \frac{distance}{speed}$

find speed in feet/second

convert the speed of 15 miles/hour into feet/second

$\frac{15miles}{hour} *\frac{5280 feet}{1 miles} * \frac{1 hour}{60 minutes}*\frac{1 minute}{60 seconds}$

= 22 feet/second

find time

since we now know distance and speed with the appropriate units, we can find time

plug values into $time = \frac{distance}{speed}$

distance = c = 340 feet

speed = 22 feet/second

$time = \frac{340}{22}$

time = 15.4545 ≈ 15 seconds

5 0

3 years ago