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Stels [109]
4 years ago
13

Find each product by distributing. (2a - 5)(a? – 2a + 1)

Mathematics
1 answer:
Westkost [7]4 years ago
5 0

Answer:

A = 1 , 1 , \frac{5}{2}

Step-by-step explanation:

Given equation as

(2a -5) (a² -2a +1) = 0

Or, (2a - 5) (a - 1 )² = 0

Or, (2a - 5) (a - 1) (a - 1) = 0

So, value of a are :

2a - 5 =0,    a - 1 =0,    a- 1 = 0

i.e     a = \frac{5}{2}

and   a = 1 , 1

Answer

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Triangles ABC and DEF are similar triangles. What are the lengths of the unknown sides?
Aleksandr [31]

Answer:

D


Step-by-step explanation:

Similar triangles have corresponding sides that are proportional.

  • AC is corresponding side to DF
  • AB is corresponding side to DE
  • BC is corresponding side to EF

From the 2 given corresponding sides, AB = 8 and DE = 12, we can figure out their proportionality.

\frac{AB}{DE}=\frac{8}{12}=\frac{2}{3}

<em>So all corresponding sides of the first triangle to the second triangle will have a ratio of 2:3.</em>

So,

\frac{AC}{DF}=\frac{10}{DF}=\frac{2}{3}\\10*3=2DF\\DF=\frac{30}{2}=15

DF = 15

And,

\frac{BC}{EF}=\frac{6}{EF}=\frac{2}{3}\\6*3=2EF\\EF=\frac{18}{2}=9

EF = 9


Answer choice D is right.

3 0
3 years ago
How many variables can there be ?
Yakvenalex [24]

Answer:

Step-by-step explanation:I am pretty sure that there can be as much as possible depending on how it is written in the word problem.

5 0
3 years ago
The sum of two numbers is 28<br> and their product is 180.<br> Find the numbers.
zubka84 [21]
The answer is 10 and 18
7 0
4 years ago
Read 2 more answers
What is x=-3 in standard form
Lina20 [59]

Answer:

y = -x + 3

Step-by-step explanation:

8 0
3 years ago
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At the pet owner’s meeting, there are 20 people who own dog, and 35people who own cat and 9 people own goldfish. Some people own
Margaret [11]

Answer:

4

Step-by-step explanation:

Given that At the pet owner’s meeting, there are 20 people who own dog, and 35people who own cat and 9 people own goldfish. Some people own both catand dog and some people own both gold fish and cat. No dog owners owngoldfish. There are twice as many people who own both goldfish and catthan people who own both dog and cat.

Total no of people =52

The venn diagram attached gives a clear picture

assuming x to be owners of both dog and cat.  Then 2x is for both goldfish and cats.

Totalling all mutually exclusive we get

64-3x=52

x=4

No of owners who own  both cat and dog =4

7 0
3 years ago
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