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olga55 [171]
3 years ago
11

Determine the percent change from 30$ to 75$​

Mathematics
1 answer:
Drupady [299]3 years ago
4 0

150%

(new value-old value/old value)*100 is the formula

so if you plug it in

(75-30/30)*100

75-30=45/30=1.5*100=150

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Which describes the correct way to convert minutes to hours?
Goshia [24]

Answer:

Divide the number of minutes by 60.

Step-by-step explanation:

7 0
3 years ago
What are the roots of the equation 4x^2+24x+45=0 in simplest a+bi form?
Serhud [2]

Answer:

X=(-1.5, 7.5)

Step-by-step explanation:

Simplifying

4x2 + -24x + -45 = 0

Reorder the terms:

-45 + -24x + 4x2 = 0

Solving

-45 + -24x + 4x2 = 0

Solving for variable 'x'.

Factor a trinomial.

(-3 + -2x)(15 + -2x) = 0

 

Set the factor '(-3 + -2x)' equal to zero and attempt to solve:

Simplifying

-3 + -2x = 0

Solving

-3 + -2x = 0

Move all terms containing x to the left, all other terms to the right.

Add '3' to each side of the equation.

-3 + 3 + -2x = 0 + 3

Combine like terms: -3 + 3 = 0

0 + -2x = 0 + 3

-2x = 0 + 3

Combine like terms: 0 + 3 = 3

-2x = 3

Divide each side by '-2'.

x = -1.5

Simplifying

x = -1.5  

Set the factor '(15 + -2x)' equal to zero and attempt to solve:

Simplifying

15 + -2x = 0

Solving

15 + -2x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-15' to each side of the equation.

15 + -15 + -2x = 0 + -15

Combine like terms: 15 + -15 = 0

0 + -2x = 0 + -15

-2x = 0 + -15

Combine like terms: 0 + -15 = -15

-2x = -15

Divide each side by '-2'.

x = 7.5

Simplifying

x = 7.5

Solution

x = {-1.5, 7.5}

7 0
2 years ago
A circle is centered on Point B. Points A, C, and D lie on it’s circumference. If Angle ADC measures 61 Degrees, what does Angle
Nostrana [21]

Answer:

122

Step-by-step explanation:

61 x 2 = 122

6 0
3 years ago
Read 2 more answers
Write an algebraic expression for the phrase. 5 times the sum of p and r
DedPeter [7]
The correct answer is 5(p+r) because sum means add

Hope this helped :)
7 0
3 years ago
54 is 75% of
VLD [36.1K]
54 is 75% of x.

75% of x:
75 \% \ of \ x=75\% \times x= \frac{75}{100}x=\frac{3}{4}x

75% of x is (3/4)x and 75% of x is 54. Set (3/4)x equal to 54:
\frac{3}{4}x=54 \\
x=54 \times \frac{4}{3} \\
x=\frac{54}{3} \times 4 \\
x=18 \times 4 \\
x=72

54 is 75% of 72.
3 0
3 years ago
Read 2 more answers
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