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Luda [366]
3 years ago
6

Work out the area of a rectangle of dimensions 4 cm by 8cm

Mathematics
2 answers:
Ivenika [448]3 years ago
8 0
Formula for area of rectangle: A= L x W

4 x 8= 32

So the area is 32.

Hope this helped!:)
dedylja [7]3 years ago
5 0
Area = 4 cm * 8 cm = 32 cm²
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Tori had $20 to buy a birthday present for her dad. She decided to buy a DVD for $18. The sales tax is 7%. Does she have enough
rodikova [14]
18 * 1.07 = 19.26

So Yes $20 Is Enough For The DVD
8 0
3 years ago
The sum of two numbers is 9. And the sum of their reciprocals is 1/2.find the numbers
Musya8 [376]
Set up a system of equations:

x + y = 9
1/x +1/y = 1/2

The easiest way to solve would be substitution.
x + y = 9 can be solved for y:

y = 9 - x

Then plug this into the second equation and solve for x:

1/x + 1/(9-x) = 1/2
(9-x) + x = x(9-x)/2
9 = (9x-x²)2
18 = 9x - x²
x² - 9x + 18 = 0
(x-6)(x-3) = 0
x = 6, 3

You can check your answer by plugging the two numbers back into both of the equations:

6 + 3 = 9
1/6 + 1/3 = 1/2

The two numbers are 6 and 3.
7 0
2 years ago
Put these numbers in order from LEAST to GREATEST.<br> 2/3,1/2,3/4,6/10
g100num [7]

Answer:

1/2,  6/10,  2/3,  3/4

Step-by-step explanation:

we can convert each fraction to a decimal to compare:

2/3 = 0.666666 repeating

1/2 = 0.50

3/4 = 0.75

6/10 = 0.60

least to greatest:

1/2,  6/10,  2/3,  3/4

4 0
2 years ago
An actor invests some money at 9​% simple​ interest, and ​$24,000 more than three times the amount at 10​% simple interest. The
Andrew [12]

Answer:

The amount invested at 9% is $93000

The amount invested at 10% is $303000

Step-by-step explanation:

Let the amount invested at 9% interest rate be x

And the amount invested at 10% rate be y

Simple Interest from x in a year = 0.09x

Simple Interest from y in a year = 0.1y

But y = 24000 + 3x

And the sun of the interests, 0.09x + 0.1y = 38670

Now we have a simultaneous eqn

y = 24000 + 3x (eqn 1)

0.09x + 0.1y = 38670 (eqn)

Substitute y into eqn 2

0.09x + 0.1(24000 + 3x) = 38670

0.09x + 2400 + 0.3x = 38670

0.39x = 38670 - 2400

x = 36270/0.39 = $93000

y = 24000 + 3x = 24000 + 3 × 93000 = $303000

8 0
3 years ago
What happens to the value of the expression 80-2r80−2r80, minus, 2, r as rrr decreases? Choose 1 answer: Choose 1 answer: (Choic
Pie

Answer:

(Choice B) B It decreases.

Step-by-step explanation:

According to the situation, the solution of the value of the expression is as follows

Let us assume

r         80 -2r

5        80 - 10 = 70

4        80 - 8 = 72

3        80 - 6 = 74

2        80 - 4 = 76

1         80 - 2 = 78

As we can from the above calculation that expression value risen if r value decreased

Therefore the correct option is B.

6 0
3 years ago
Read 2 more answers
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