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3 years ago

What is 2/5% of 820? 1.8 2.05 2.88 3.28

Mathematics

1 answer:

Margarita [4]3 years ago

6 0

Answer:

D) 3.28

Step-by-step explanation:

820/x=100/2.5

(820/x)*x=(100/2.5)*x - we multiply both sides of the equation by x

820=40*x - we divide both sides of the equation by (40) to get x

820/40=x

20.5=x

x=20.5

now we have:

2.5% of 820=20.5

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A) The sum of −3x+5 and 7−4x is subtracted from 5x+17.

AlekseyPX

A. -3x+5+7-4x
-3x-4x+5+7
-7x+12

-7x+12-5x+17
-7x-5x+12+17
-12x+29

B. -5*(x+2)= -5x-10
-6x-1+ (-5x-10)= -6x-5x-1-10=
-11x-11

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3 years ago

You are scheduling a new delivery route and you need to find out how long it will take a driver to complete the route. You start

Sergio039 [100]

The route will take four hours and fifteen minutes. If you start at 9:50 and count four hours, you'll get to 1:50, add ten to get to 2:00, then add 5 minutes to get to 2:05. Four hours plus ten minutes plus five minutes, 4:15.

4 0

3 years ago

Read 2 more answers

What is the median of 40,33,37,54,41,34,27,39,35

Sauron [17]

Answer:

It's 37

Step-by-step explanation:

The given data set is ;

40,33,37,54,41,34,27,39,35

We arrange the data set in ascending order to obtain;

{27,33,34,35,37,39,40,41,54}

The median is the middle number {37}

8 0

3 years ago

A triangle has side lengths of (7x-4)(7x−4) centimeters, (x+3)(x+3) centimeters, and (3y+2)(3y+2) centimeters. Which expression

Papessa [141]

Answer:

This assumes that the question was meant to read:

"A triangle has side lengths of (7x−4) centimeters, (x+3) centimeters, and (3x+2) centimeters." And not "A triangle has side lengths of (7x-4)(7x−4) centimeters, (x+3)(x+3) centimeters, and (3y+2)(3y+2) centimeters."

If the revision is correct, the perimeter is 11x + 1 cm

=============================================

If the question was correctly written, then answer is:

50x^2 - 50x + 9y^2 + 12 y + 29

===============

Step-by-step explanation:

(7x-4) cm

+ (x+3) cm

+ (3x+2) cm

11x + 1 cm

If the question was correctly written as is, then:

(7x-4)(7x−4) = 49x^2 - 56x + 16

+(x+3)(x+3) = + x^2 + 6x + 9

+(3y+2)(3y+2) = +9y^2 + 12 y + 4

50x^2 - 50x + 9y^2 + 12 y + 29 cm

8 0

2 years ago

The answer to number 3

Reptile [31]

Answer:

4.5×10^17 m²

Step-by-step explanation:

The radius is half the diameter, so we can make the substitution r=d/2 into the formula to get ...

A = 4πr² = 4π(d/2)² = πd²

Filling in the given values and doing the arithmetic gives ...

A = 3.14×(3.8×10^8 m)² = 45.3416×10^16 m²

A ≈ 4.5×10^17 m²

We round to 2 significant digits because that is the precision of the given diameter.

6 0

3 years ago