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NARA [144]
3 years ago
8

Maria bought three t-shirts at her favorite store t shirt paradise. she had a 25% of coupon and paid $45 in total.what was the o

riginal price for each shirt?
Mathematics
2 answers:
SSSSS [86.1K]3 years ago
5 0
If the discount is 25%, then $45 is 75% of the original price:
0.75x = 45
where x is the original price of the three shirts
Solve for x:
x = 45/0.75
x = 60
Since there are three shirts, we divide this by 3:
60/3 = 20
The answer is $20.
tatiyna3 years ago
4 0
Let, the original price = x
x = 45 * 125 /100
x = 45 * 1.25
x = 56.25

So, your final answer is $56.25

Hope it helped
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Simplify (2√5+3√7)squared
belka [17]
Ok....
Simplified would be 12.40
Squared would be 153.99 or fraction form would be 83 + 12 \sqrt{35}

H0P3 It H3LPS :)
6 0
3 years ago
What are the roots of the equation?<br><br> x^2(6x−11)(7x−8)=0
trasher [3.6K]

multiply all the factors in x^2

 to get the roots which are 0, 11/6 and 8/7


3 0
3 years ago
Read 2 more answers
Let $a$ and $b$ be nonzero real numbers such that
algol [13]
<h3>Answer:   -7/2</h3>

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

Explanation:

Let's expand out (2 - 7i)(a + bi) using the FOIL rule

(2 - 7i)(a + bi) = 2a + 2bi - 7ai - 7bi^2

(2 - 7i)(a + bi) = 2a + 2bi - 7ai - 7b(-1)

(2 - 7i)(a + bi) = 2a + 2bi - 7ai + 7b

(2 - 7i)(a + bi) = (2a+7b) + (2bi-7ai)

(2 - 7i)(a + bi) = (2a+7b) + (2b-7a)i

We're told the result is purely imaginary. What this means is that the real part (2a+7b) is zero, while the imaginary part (2b-7a) is nonzero. If both are zero, then we have 0+0i = 0 which is purely real.

For example, the complex numbers 0-7i and 0+2i are purely imaginary.

Let's use the fact that 2a+7b must be zero to do the following steps:

2a+7b = 0

2a = -7b

a = -7b/2

a/b = -7/2 which is the final answer

We must check to see if 2b-7a is nonzero

2b - 7a = 2b - 7(-7b/2)

2b - 7a = 2b + 24.5b

2b - 7a = 26.5b

The result is nonzero if and only if b is nonzero. Luckily we're told b is nonzero at the top of the problem. So we don't have any worries that (2b-7a) is zero.

Therefore, (2a+7b) + (2b-7a)i will be purely imaginary with a/b = -7/2

------------------

A concrete example:

Let a = -14 and b = 4

a/b = -14/4 = -7/2

(2-7i)(a+bi) = (2-7i)(-14+4i) = 0 + 106i which is purely imaginary.

I'll let you do the steps in expanding that out using the FOIL rule.

4 0
1 year ago
A man gathers nuts in a forest. Each time he finds a nut, there is a 20% chance it is a pecan and a 35% chance it is a walnut.
gladu [14]
Either a pecan or walnut means you add the probabilities together

20% plus 35% equals 55%
7 0
3 years ago
seven less than the sum of p and t is as much as nine times a number y subtracted from 85 is seven times the sum of four and y
natita [175]

7-(p+t) =  9(85-n) = 7(4+y)

Algebra is a kind  of mathematics that includes symbols and the arithmetic operations across these symbols. These symbols do not have any fixed values and are called variables.  

An algebra expression contain coefficient variable and a constant

We apply various methods to solve those question

An algebra expression is also called an equation

let the number be x

Seven less than the of p and t

= 7-(p+t)…….(1)

Nine times a number y subtracted from 85

= 9(85-n)…..(2)

Seven times the sum of four and y

= 7(4+y)……(3)

Combining equations (1), (2) and (3) according to the question :

7-(p+t) =  9(85-n) = 7(4+y)

Learn about algebra here :

brainly.com/question/2972832

#SPJ9

5 0
1 year ago
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