3 years ago

Which addition equation matches the number line

Mathematics

1 answer:

sattari [20]3 years ago

8 0

1/3 + (-1 2/3) = 1 1/3

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At a certain time of the day, a tree 15 m tall casts a shadow of 12 m, while a second tree casts a shadow of 20 m. How tall is t

Anna35 [415]

We can write a proportion: 15 m is to 12 m as some other height $h$ is to 20 m

So we get
$\frac{15}{12}=\frac{h}{20}$
$\rightarrow 15*20=12h$
$\rightarrow 12h=300$
$\rightarrow h=25$

So the second tree is 25 m tall.

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3 years ago

Write an equation of the line that passes through the points.<br><br> (2, 5), (0, 5)<br><br> Y =

vodomira [7]

Right off the bat we know that the y-intercept is going to be 5 because of the second co-ordinate.

Now for the slope, because the y co-ordinate doesn't change, it has no slope so the equation is simply: y=5

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3 years ago

Alexandra has a stand in the marketplace where she sells her cumin for 7.20 per kilogram. If she sells 90 kilograms of cumin her

Drupady [299]

Answer:

$234

Step-by-step explanation:

First we need to define profits. Profits are Income minus Expenses:

P = I - E

We know profits are $414, so:

414 = I - E

We also can calculate income, as it is equal to price by the sales:

I = p*Q

Here she sold 90 kgs at $7.20 b kg. So:

I = p*Q = 7.20 * 90 = 648

So, replacing in profits equation:

414 = I - E

414 = 648 - E

If we sum E in both sides:

414 + E = 648 - E + E = 648

414 + E = 648

Now, subtracting 414 in both sides:

414 + E - 414 = 648 - 414

E = 234

So, her expenses are $234

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Answer:

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Step-by-step explanation:

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