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2 years ago

~Giving brainliest!~

Mathematics

1 answer:

ruslelena [56]2 years ago

4 0

Answer:

a) = 4/9 b) -20/21

c) -77/6 d) 39/22

Step-by-step explanation:

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A rectangle has a length of 5 yards and e width if 3 yards what is the perimeter explain your answer

Naddika [18.5K]

Since the question is asking for the perimeter, you have to find the length of the sides of the rectangle.

If one of the sides has a length of 5 yards, then the side parallel to that side also has a length of 5 yards.

So you have to multiply 5 with 2

5×2=10

If the other side has a length of 3 yards, then the side parallel to that side also a length of 3 yards

So you have to multiply 3 with 2

3×2=6

Then you add the two answers

10+6=16

So you get 16 yards

Hope this helps!

6 0

3 years ago

You need a 65% alcohol solution. On hand, you have a 50 mL of a 30% alcohol mixture. You also have 70% alcohol mixture. How much

DIA [1.3K]

Answer:

350 mL

Step-by-step explanation:

Let q represent the quantity (in mL) needed of the 70% solution. Then the total amount of mixture will be q+50 milliliters. The total amount of alcohol in the mixture will be ...

0.70q +0.30(50) = 0.65(50 +q)

.05q = 17.5 . . . . . . subtract (0.65q +1.50)

q = 350 . . . . . . . . . divide by 0.05

You will need 350 mL of the 70% solution.

5 0

3 years ago

Please help, i'm horrible @ math :)

katovenus [111]

$\displaystyle\\
1 \frac{2}{5} +\Big(-5 \frac{1}{2} \Big) = ? \\ \\ 
1 \frac{2}{5} = \frac{1\times 5+2}{5}=\boxed{\frac{7}{5}} \\ \\ 
-5 \frac{1}{2} =-5 -\frac{1}{2} = \frac{-5\times2-1}{2} =\frac{-10-1}{2}=\frac{-11}{2}= \boxed{-\frac{11}{2} }\\ \\ \texttt{OR} \\ \\ 
-5 \frac{1}{2} = -\Big(5 \frac{1}{2} \Big)= -\Big( \frac{5\times2+1}{2} \Big)=-\Big( \frac{11}{2} \Big)= \boxed{-\frac{11}{2} }$

$\displaystyle\\
\Longrightarrow ~~1 \frac{2}{5} +\Big(-5 \frac{1}{2} \Big) =\frac{7}{5} -\frac{11}{2} = \frac{7\times 2}{5\times 2} -\frac{11\times 5}{2\times 5} = \\ \\ 
= \frac{14}{10} -\frac{55}{10} = \frac{14-55}{10} =\frac{-41}{10} = -\frac{41}{10}=-\frac{40+1}{10}=\boxed{\boxed{-4\frac{1}{10}}}$

7 0

3 years ago

Given a = 4 and b = -2, evaluate -|b - a|.

Alchen [17]

-6 is the answer
Hope this helps

6 0

3 years ago

The independent variable is the day of the year. The function is the cumulative number of accidents since the first of the year

NARA [144]

Answer:

The units of the average growth rate is number of accidents per day.

Step-by-step explanation:

We are given the following in the question:

The independent variable is the day of the year.

The function is the cumulative number of accidents since the first of the year at a certain dangerous intersection.

Average growth represents the rate at which the dependent variable changes as the independent variable changes.

Independent variable: day of the year

Dependent variable: cumulative number of accidents

Thus, the growth rate will have units

$\dfrac{\text{Accidents}}{\text{Day}}$

Thus, the units of the average growth rate is number of accidents per day.

5 0

4 years ago