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gizmo_the_mogwai [7]
3 years ago
9

If (A:20:4:16) is a proportion the find out the value of A fastly​

Mathematics
1 answer:
vladimir2022 [97]3 years ago
6 0

Answer: A = 5

Step-by-step explanation:

I'll rewrite this as fractions.

\frac{A}{20}=\frac{4}{16}

Solve for A,

A=\frac{20*4}{16}\\ A=\frac{80}{16}

A=5

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Solve the simultaneous equations. You must show all your working to find x and y. 1/2x -3y = 9 5x y + y = 28
dedylja [7]

Answer:

\huge\boxed{x = 6 , y = -2}

Step-by-step explanation:

\sf \frac{1}{2} x - 3y = 9-----------(1)\\5x + y = 28 ----------(2)

Taking equation (1)

\sf \frac{1}{2} x -3 y=9

Multiplying both sides by 2

\sf x-6y = 18

Adding 6y to both sides

\sf x = 18+6y

Putting this in (2)

5(18+6y) + y = 28

5(18+6y) + y = 28

90 + 30y+y = 28

31y+90-28 = 0

31 y + 62 = 0

31y = -62

Dividing both sides by 31

y = -2

Now,

x = 18 + 6y

x = 18+6(-2)

x = 18-12

x = 6

7 0
3 years ago
Read 2 more answers
Is 0.034 1/100 of 3.4?
Sphinxa [80]
Yes 0.034 is the correct answer
6 0
3 years ago
Read 2 more answers
Identify the correct units to express the following idea.
hammer [34]

The units that we should use are gallons per day, we get:

r = 2.4\frac{gallons}{day}

<h3>Which units should we use?</h3>

We want to express the fact that every day you use 2.4 gallons of gasoline.

So we have two types of units in the above sentence, time (in days), and volume (of the gasoline consumed).

Then we conclude that the units that we should use is volume over time, particularly, gallons per day.

So we can represent that measure as:

r = 2.4\frac{gallons}{day}

If you want to learn more about units:

brainly.com/question/1972490

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8 0
2 years ago
13 gallons of water are used to completely fill 3 fish tanks. If each tank holds the same amount of water, how many gallons will
enyata [817]

Answer:

Each tank holds 4.33 gallons of water.

Step-by-step explanation:

Gallons of water used to fill tanks = 13 gallons

Number of fish tanks filled = 3 fish tanks

To calculate the amount of water in one tank, we will divide gallons of water used to fill tanks by number of fish tanks filled.

Water in one tank =  

Water in one tank = 4.33 gallons

Each tank holds 4.33 gallons of water.

5 0
3 years ago
Read 2 more answers
Find the slope of the graph of the linear equation.<br> D. 5y - 10 = x
bezimeni [28]

Answer:

1/5

Step-by-step explanation:

First, put the equation into slope-intercept form: y=mx+b, where m is the slope and b is the y-intercept.

5y=x+10, then divide both sides by 5;

y=1/5x+2

The slope is m, and m=1/5.

3 0
3 years ago
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