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astra-53 [7]
4 years ago
9

I need help I did it but got it wrong plz help

Mathematics
2 answers:
Nostrana [21]4 years ago
5 0
So we know that 20% off means that it has 80%, and I just need to take $3.5×80÷100=$2.8 for the new price. Additionally, another 10% off which means that 2.8×90÷100=$2.52 for the final price. Hope it help!
vazorg [7]4 years ago
5 0
3.50 x 0.20= 0.70
3.50 - 0.70= 2.80
2.80 x 0.10= 0.28
2.80 - 0.28= 2.52
So...Your answer would be 2.52
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The length of a rectangle is 2 km less than 3 times the width. If the perimeter is 68 km,What is the length of the rectangle
11111nata11111 [884]

Answer:

The length of the rectangle is 25 km

Step-by-step explanation:

Let

x ----> the length of rectangle

y ----> the width of rectangle

we know that

The perimeter of rectangle is

P=2(x+y)

we have

P=68\ km

so

68=2(x+y)

simplify

34=(x+y)---- > equation A

x=3y-2 ---> equation B

substitute equation B in equation A and solve for y

34=(3y-2)+y

34=4y-2

4y=34+2

4y=36

y=9\ km

Find the value of x

x=3(9)-2=25\ km

therefore

The length of the rectangle is 25 km

6 0
3 years ago
Suppose the shipping company were packing balls with a diameter of 2 inches instead of cubes. Would the large box hold more ball
Roman55 [17]

Answer:

More

Step-by-step explanation:

Because the absence of corners allows more space for more balls

8 0
3 years ago
Simplify 3 2x. What is the coefficient?
torisob [31]
What is the missing sign between 3 and 2? I assume that it's multiplication sign, or *

3*2=6 (twice three is 6, because 3+3=6)

so the result of 3*2x is 6x, because 2x is actually 2*x, so we have 3*2*x - we are allowed to simplify this!

and 6 is the coefficient: the number by which a variable is multiplied.
3 0
3 years ago
The length of a rectangle is 4m longer than its width.
FromTheMoon [43]

Call the length a, the width b

Perimeter = (a+b) x 2

We have : a - b = 4 and (a+b) x 2 = 56

-> a + b = 28
-> a - b = 4

=> a+b + (a-b) = 32
2a = 32
a = 16
b = 56:2-16 = 12

So, the length = 16 and the width = 12

8 0
3 years ago
What is the equation for the total cost
drek231 [11]
The correct answer is A
5 0
3 years ago
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