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3 years ago

Please help. Will give brainliest!!

Mathematics

1 answer:

N76 [4]3 years ago

4 0

Answer:

Step-by-step explanation:

For starters, we can combine like terms. we can combine -3 with -2 to get -5, and $\frac{3}{5} x$ with $\frac{-1}{5} x$ to get $\frac{2}{5} x$ . Now, we have $\frac{2}{5} x-5$ as our final answer, or answer A. Also, brainliest is not necessary. Hope this helps!

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Tanya [424]

I like pizza pizza is good for my health

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4 years ago

Mrs. Miller spends 15% of each weekday traveling in her car. How many hours per day does she spend in her car during the week? (

andrezito [222]

Answer:

18 hours

Step-by-step explanation:

There are 24 hours in a day and we have 5 weekdays per week.

15% of 24 hours

15/100×24

0.15×24

=3.6 hours

Mrs Miller spends 3.6 hours of each weekday traveling in her car.

There are 5 weekdays in a week to include: Monday, Tuesday, Wednesday, Thursday and Friday.

If she spends 3.6 hours per weekday

Then,

During the week, she will spend

3.6 hours× 5 weekdays

=18 hours

She will spend 18 hours per week traveling in her car.

8 0

3 years ago

The store clerk has 21 mugs to display on shelves. She wants to display a equal number of mugs on each shelf with no mugs left o

elena55 [62]

I believe it’s C, 21 divided by 7. This one doesn’t leave any extra mugs out cause 21 divided by 7 is 3, leaving 7 mugs per 3 shelves and having none left.

8 0

3 years ago

luvenia can row 4mph in still water. She takes as long to row 7 mi upstream as 21 mi downstream. how

xeze [42]

Answer:

The speed of the river is 2mph.

Step-by-step explanation:

I guess that we want to find the speed of the river.

First, remember the relation: speed*time = distance

If the speed of the river is Sr, when Luvenia moves downstream (in the same direction that the flow of the water) the total speed will be equal to the speed of Luvenia in still water plus the speed of the water:

Sd = 4mph + Sr

and at this speed, in a time T, she can move 21 miles, so we have:

Sd*T = (4mph + Sr)*T = 21 mi

When moving upstream, the speed will be:

Su = (4mph - Sr)

and in the same time T as before, she moves 7 miles, so we have the equation:

Su*T = (4mph - Sr)*T = 7 mi

Then we have two equations:

(4mph + Sr)*T = 21 mi

(4mph - Sr)*T = 7 mi

Now we can take the quotient of those two equations and get:

((4mph + Sr)*T)/((4mph - Sr)*T) = 21/7

The time T vanishes, and we can solve it for Sr.

(4mph + Sr)/(4mph - Sr) = 3

4mph + Sr = 3*(4mph - Sr) = 12mph - 3*Sr

4*Sr = 12mph - 4mph = 8mph

Sr = 8mph/4 = 2mph.

7 0

4 years ago

How much water should we add to 35kg of sugar syrup to change it's concentration from 30% to 25%

agasfer [191]

Answer:

Water = 1/5 of the volume of the syrup

Step-by-.step explanation:

Suppose we had 1000 cm^3 of syrup and the new volume after adding water is x cm^3. Now the amount of sugar stays the same so we have the equation 35 * 1000 = 25 * x

x = (30 * 1000) / 25 = 30,000 / 25

= 1200 cm^3

So we need to add 200 cm^2 of water .

In general terms, we need to add water which equals 1/5 of the volume of the syrup,

4 0

4 years ago