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ArbitrLikvidat [17]
3 years ago
5

Yolanda has finished 45% of the homework problems she was assigned. So far she has finished 27 problems.

Mathematics
1 answer:
sveta [45]3 years ago
7 0
p\%=\frac{p}{100}\\\\A.\ 45\%=\frac{45}{100}=\frac{45:5}{100:5}=\boxed{\frac{9}{20}}\\\\B.\   \begin{array}{ccc}45\%&-&27\\100\%&-&x\end{array}\ \ \ \ |cross\ multiply\\\\\\45\cdot x=27\cdot100\\45x=2700\ \ \ \ |divide\ both\ sides\ by\ 45\\\boxed{x=60}\\\\C.\ 60-27=\boxed{33}
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The expression below is the factorization of which of the following trinomials? (2x+7)(x+5)
Gwar [14]

Answer:

2x2+17x+35

Step-by-step explanation:

=(2x+7)(x+5)

=(2x)(x)+(2x)(5)+(7)(x)+(7)(5)

=2x2+10x+7x+35

=2x2+17x+35

5 0
3 years ago
Read 2 more answers
How do I write an equation with 5he restrictions x does not equal 14, x does not equal 2 and x does not equal 0???
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3 0
3 years ago
(-5)^2-2x(-9)+6<br> Please show work and step by step.
Varvara68 [4.7K]

Answer:

<h2>49</h2>

Step-by-step explanation:

Use PEMDAS:

P Parentheses first

E Exponents (ie Powers and Square Roots, etc.)

MD Multiplication and Division (left-to-right)

AS Addition and Subtraction (left-to-right)

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

(-5)² - 2 × (-9) + 6          <em>first </em><em>E</em><em>xponents</em>

25 - 2 × (-9) + 6          <em>next </em><em>M</em><em>ultiplication</em>

25 + 18 + 6              <em>next </em><em>A</em><em>ddition</em>

43 + 6 = 49

5 0
3 years ago
What number is 80% of 80?
gtnhenbr [62]

Answer:

<em>6</em><em>4</em><em> </em><em>IS</em><em> </em><em>THE</em><em> </em><em>ANSWER</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em>

3 0
2 years ago
Can anyone please help me with this geometry question?
Ainat [17]

Answer:

Step-by-step explanation:

let base be x and height be 3x

we know area of parallelogram is

base*height

ie x*3x=675

3x^2=675

x^2=675/3

x^2=225

x= square root of 225

x=15

therefore base =15

height = 45

8 0
3 years ago
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