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Ivenika [448]
2 years ago
11

5.5 - Solving Quadratic Equations - Perfect Square Trinomials and Difference of Squares

Mathematics
1 answer:
photoshop1234 [79]2 years ago
3 0

Answer:

Step-by-step explanation:

(a²-2ab+b²)=(a-b)²

a²+2ab+b²=(a+b)²

i solve b and d

(b)

9x²-36x+36=0

(3x)²+2×3x×-6+(-6)²=(3x-6)²

(d)

a²-b²=(a+b)(a-b)

4x²-81=0

4x²-81=(2x)²-9²=(2x+9)(2x-9)

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A basketball player has a 50% chance of making each free throw. What is the
Ne4ueva [31]

Answer:

20.508%

Step-by-step explanation:

1/2 chance for one free throw.

1/2*4/10=4/20=1/5

Therefore, 20.508%

8 0
3 years ago
If nelson invests $5000 for 4 years and earns $600, what is the simple interest rate?
klio [65]

Answer: Simple interest rate = 3%.


Step-by-step explanation: We are given invested amount = $5000.

Number of years of investment = 4 years.

Interest earned = $600.

Simple interest formula.

I = P R T.

Where I is the earned interest, P is the invested amount , R is the rate of interest and T is the time in years.

Plugging values in formula, we get

600 = 5000 × R × 4

600 = 20000R.

Dividing both sides by 20000, we get

\frac{600}{20000}  = \frac{20000R}{20000} .

0.03 = R.

Multiplying by 100 to convert it in percentage, we get

0.03 × 100 = R

R = 3 %.



4 0
3 years ago
the original price of a winter jacket is $125 is on sale for $81.25 cents what is the percent discount
Hoochie [10]
81.25 / 125 = 0.65
so 65 %

to check 65% * 125 = 81.25 
hope this helps ;)

5 0
3 years ago
Three years ago, Ava lent her sister $400 to buy some clothes. Today Ava’s sister paid her loan in full with $454. What simple a
Ostrovityanka [42]
Ava's sister paid a 4.5% annual interest rate

Her sister paid $54 more than she borrowed, divide that by 3 (years till she paid)

54/3 = 18

That's $18 for every year she'd had the $400 loan out, divide it by 4 to get the percentage 

18/4 = 4.5/100 = 4.5%
5 0
3 years ago
Read 2 more answers
Which of the following is not a tax collected by the federal government?
rodikova [14]

The tax that is not collected by the federal government is \boxed{{\text{excise tax}}}. Option (b) is correct.

Further explanation:

Given:

The options are as follows.

A. Sales tax

B. Excise tax

C. Income tax

D. Payroll tax

Explanation:

The sales tax is a tax that is imposed on the products sold. The sale tax is collected by the federal government.

The excise tax is the tax that is imposed on purchasing the goods .The excise tax is not collected by the federal government.

The tax that is imposed on the salaries of an individual or company is known as the income tax.

The income tax is collected by the federal government.

The tax that is imposed on the employer as the percentage of salaries of employees is known as the payroll tax. The payroll tax is collected by the federal government.

Option (a) is not correct.

Option (b) is correct.

Option (c) is not correct.

Option (d) is not correct.

Hence, the tax that is not collected by the federal government is \boxed{{\text{excise tax}}}. Option (b) is correct.

Learn more:

1. Learn more about inverse of the functionhttps://brainly.com/question/1632445.

2. Learn more about equation of circle brainly.com/question/1506955.

3. Learn more about range and domain of the function brainly.com/question/3412497

Answer details:

Grade: High School

Subject: Mathematics

Chapter: Investment

Keywords: Federal government, tax, sales tax, excise tax, income tax, payroll tax, state government, revenue, local government.

8 0
2 years ago
Read 2 more answers
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