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3 years ago

Multiple Choice

Mathematics

1 answer:

stellarik [79]3 years ago

3 0

Answer:

c is your answer to the question

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Which temperature is greater, -20F or -60F

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-20

Step-by-step explanation:

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Solve 732,178 + 167 - 542,137

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Ok I got 190,208
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Heather left the hospital and drove toward the desert at an average speed of 35 km/h. Danielle left sometime later driving in th

elena55 [62]

Answer:

Danielle drove 3 hours

Step-by-step explanation:

Suppose Heather moved in the x direction.

Then Danielle moved in the opposite direction, that is, she moved in the -x direction.

Let's call $V_1$ , $x_1$ , $t_1$ at the speed, distance and time that I code Heather

Let's call $V_2$ , $x_2$ , $t_2$ at the speed, distance and time Danielle codes.

Observe the following diagram:

(x) Heather <------ $x_1$ --------- hospital ---------- $x_2$ -----------> Danielle (-x)

So:

$V_1 = 35\ km/h$

$t_1 = 4\ h$

$V_2 = 50\ km/h$

We know that after 4 hours the distance between Heather and Danielle was 290 km.

That is to say:

$x_2 + x_1 = 290\ km/h$

We know that $x_1= v_1t_1$

$x_1 = 35(4)$

$x_1 = 140\ km$

We already know $x_1$ , the distance from the hospital to Heather, so we can find $x_2$ and thus know $t_2$

So:

$x_2 = 290 - 140\\\\x_2 = 150\ km$

Then:

$t_2 = \frac{x_2}{v_2}\\\\t_2 = \frac{150}{50}\\\\t_2 = 3\ h$

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3 years ago

What expression is equivalent to ⅗?

Scilla [17]

Answer:

6/10

Step-by-step explanation:

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Write the following number by entering one digit in each box of the place value chart.

solniwko [45]

Answer:

Ones . Tenths Hundredths Thousandths

3 . 0 2 9

Standard Form

3.029

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