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netineya [11]
3 years ago
8

3 is what precent of 40

Mathematics
1 answer:
Lesechka [4]3 years ago
7 0

Answer:

7.5

Step-by-step explanation:

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Simplify 1/2+1/3-1/4​
Vlad [161]

Answer:

7/12

Explanation:

Here are the steps to follow:

Write down the factors for the numerator and the denominator.

Determine the largest factor that is common between the two.

Divide the numerator and denominator by the greatest common factor.

Write down the reduced fraction.

6 0
3 years ago
Read 2 more answers
–7x + 10 = –20 or 10 = 7x – 20
marin [14]
It depends what the y intercept of the line is
6 0
3 years ago
Read 2 more answers
Which graph represents the following equation? 3x - y - 1 = 0
Y_Kistochka [10]

Answer:

You didn't post the graph choices, but it will look something like the attached photo. I also attached how to put the equation into slope-intercept form and another photo explaining what that means in case you haven't learned!

Step-by-step explanation:

5 0
3 years ago
Lindsey rows a boat downstream for 80 miles. The retum trip upstream took 12 hours longer. If the current flows at 3 mph, how fa
slamgirl [31]

Answer:

14hrs

Step-by-step explanation:

v = speed in still water

 

t = downstream trip time

 

d = distance = 182 miles; same distance both downstream and upstream

 

t + 12 = upstream return trip time

 

u = current flow = 3 mph

 

Downstream:  d = (v + u)t;  Upstream:  d = (v - u)(t + 12)

 

(v - 3)(t + 12) = 182  (equation 1)

(v + 3)t = 182  (equation 2)

 

Subtract equation 2 from equation 1 to get t:

 

(vt + 12v -3t -36) - (vt + 3t) = 0

 

12v - 6t - 36 = 0

 

t = 2v - 6

 

Substitute this result for t into equation 2 and solve for v:

 

(v + 3)(2v - 6) = 182

 

2v^2 - 6v + 6v - 18 = 182

 

v^2 = 100

 

v = 10 mph

 

t = 2v - 6 = [2(10) - 6] hrs = 14 hrs

7 0
3 years ago
The perimeter of a rectangle is 54cm. The area of the same rectangle is 176 cm^2. What are the dimensions of the rectangle?
densk [106]

Given is rectangle with perimeter = 54 centimeters and area = 176 squared centimeters.

Let's consider the length of rectangle = L and width of rectangle = W.

We know the following formulas for rectangle :-

Perimeter = 2 x (L + W)

Area = L x W

So we have 2 x (L + W) = 54 and L x W = 176.

L + W = 27 and L x W = 176

We need to find two positive integers such that their sum is 27 and product is 176.

Using trial and error, we have two such positive integers such that 11 + 16 = 27 and 11 x 16 = 176.

So, the dimensions of rectangle would be 11cm x 16cm.

Hence, option A is correct i.e. 11 cm by 16 cm.

3 0
3 years ago
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