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3 years ago

Please help me ?!!!!!

Mathematics

1 answer:

Dmitrij [34]3 years ago

4 0

Answer:

a is the answer of your question.

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Mai is riding her bicycle she take 6 hours to ride 38.4 kilometers. What is her speed ?

iVinArrow [24]

Time = 6hours

Distance = 38.4 Km

Speed = distance /time

= 38.4/6

= 6.4 km/h

5 0

3 years ago

Read 2 more answers

As a nurse, part of your daily duties is to mix medications in the proper proportions for your patients. For one of your regular

spayn [35]

Answer:

10 milligrams of Medication A

Step-by-step explanation:

We'll write proportions/ratios for this:

20:16 is the usual proportion, and x:8 is this week's dose. The ratio from A to B has to be equal, so

20/16 = x/8

Cross-multiply:

(20)(8) = (16)(x)

160 = 16x

divide both sides by 16

x = 10

Please let me know if you have questions about this answer.

5 0

3 years ago

Can y’all help me on question 22?!

Georgia [21]

Answer:

B. 4 7/8 x 5 x 12 1/2

Step-by-step explanation:

volume = L x H x W

8 0

3 years ago

Five yards of material is needed to make

Mkey [24]

Answer:

The y-coordinate would be 17.5

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $y/x=k$ or $y=kx$

In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

Let

y ----->material needed in yards

x ----> number of curtains

we know that

For y=5, x=2

Find the value of the constant of proportionality k

$k=y/x$

substitute the given values of x and y

$k=\frac{5}{2}=2.5$

The linear equation is equal to

$y=2.5x$

If the x-coordinate was 7

then

substitute in the equation x=7 and solve for y

$y=2.5(7)$

$y=17.5$

therefore

The y-coordinate would be 17.5

6 0

3 years ago

A rectangle with positive are has length represented by the expression 3x^2+5x-8 and width by 2x^2 +6x write an expression in te

Nata [24]

Answer:

$c=10x^2+22x-16\\A=6x^4+28x^3+14x^2-48x$

Step-by-step explanation:

Given

Length is $l=3x^2+5x-8$

Width is $w=2x^2+6x$

Perimeter of the rectangle is the sum of the sides

$\Rightarrow c=2(3x^2+5x-8+2x^2+6x)\\\Rightarrow c=2(5x^2+11x-8)\\\Rightarrow c=10x^2+22x-16$

Area is given by

$\Rightarrow A=(3x^2+5x-8)(2x^2+6x)\\\Rightarrow A=6x^4+18x^3+10x^3+30x^2-16x^2-48x\\\Rightarrow A=6x^4+28x^3+14x^2-48x$

8 0

3 years ago