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never [62]
3 years ago
11

How do you find a percent change from 72 to 90

Mathematics
2 answers:
Andrej [43]3 years ago
8 0
Easy, the difference between 72 and 90 is 18, so you just take 18 divided for 72 to get the percent change which equal 0.25 or 25%. Hoped it help!
nirvana33 [79]3 years ago
6 0
Ya 18 is right my class just did this in math haha!!
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How many trucks would you load in 9 hours if i loaded 5 trucks every 6 minutes
valentinak56 [21]
The answer is 270 trucks.
5 0
3 years ago
Find the other two vertices of a square with one vertex (0, 0) and another vertex (4, 2). Can you find another answer?
Margarita [4]

It is given that two vertices of square are (0,0) and (4,2).

Now the problem is that you haven't given that whether these two vertices are adjacent vertices or opposite vertices of the square.

1. By Supposing that these two are adjacent vertices of Square

The third vertex will be at (-4,2) which lies in third quadrant.

Suppose the coordinate of fourth vertex be (x,y).

Mid point of line joining (4,2) and (-4,2) is{ [4+(-4)]/2,(2+2)/2} is (0,2).

Mid point of line joining (x,y) and (0,0) is (x/2,y/2).

Since diagonals of square bisect each other,

∵ x/2=0

⇒x=0

and

y/2=2

⇒y=4

So, The Coordinate of  fourth vertex is (0,4).

Now coming back to second condition if these are two opposite vertex of Square.

Let the third coordinate be (a,b).

Length of diagonal=\sqrt{(4-0)^2+(2-0)^2}=\sqrt20=2\sqrt5

Now,let side of Square be A.

Then length of Diagonal of square =√2 A

⇒√2 A=2√5

⇒A =√10

As third vertex is (a,b).

Using distance formula

a² + b²=10  -------------(1)

(a-4)²+ (b-2)²=10  --------------(2)

Solving expression (1) and (2), we get

⇒a²+ b²=(a-4)² +(b-2)²

⇒2a + b =5

⇒b=5-2a

Putting the value of b in (1),we get

⇒a² +(5-2a)²=10

⇒a²+25+4a²-20a =10

⇒5a²-20a+15=0

⇒a² - 4a + 3=0

Splitting the middle term,we get

⇒(a-3)(a-1)=0

⇒a=3  ∧  a=1

we get b=5-2×1=3 and b=5-2×3=5-6=-1

So,the other vertex are (1,3) and(3,-1).





3 0
2 years ago
Θ lies in Quadrant II . sinθ=47sinθ=47 What is the exact value of cosθ in simplified form?
Pepsi [2]
I am assuming you mean 4/7 as the sine or cosine cannot be higher than 1.

Lets find <span>θ,
</span>
θ = [sin-1](4/7) = 34.85 °

But lets take into account that this value is the equivalent in Quadrant I.

If Θ lies in Quadrant II , then θ = 180 ° - 34.85 ° = 145.15 °

So cosθ = cos (145.15) = -0.821
4 0
3 years ago
Which of the following could be the graph of the equation y = -2x? *<br> please answer
mihalych1998 [28]
B.

The line starts at the origin and goes down by two.
6 0
3 years ago
You lost your cell phone and have to use a phone booth. The call will cost $0.25 for the first minute and
ElenaW [278]

Answer:

4 minutes

Step-by-step explanation:

make equation

0.25+(0.15x)= 0.85

solve for x

0.15x= 0.60

x=4

7 0
3 years ago
Read 2 more answers
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