Find the product of (4z^2+7z-8) and (-z+3)

Answers

Answer 1
Answer:

Answer: the value of x=5 & y=29

Step-by-step explanation:


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HOW TO FIND THE MISSING NUMERATOR IN ANY FRACTIONS LIKE 4/8=  ?/4

Answers

Fractions are direct proportions. 
So when you have (4)/(8) you can simplify the fraction
  (2)/(4) and simplify even further to (1)/(2). This would be a fraction in simplest form

How many names are for square

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There are about four other names for a square.
Four names for the square :)

I need 3 equivalent ratios for 21:56, 48:36, 6:54 and 22:55

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Is each one a separate question?                

Jenna flips to pennies 105 times how many times can she expect both coins to come up heads

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53 because there is only 2 sides of a penny so 105 divided by 2 is 52.5 
Half heads. Half tails. Now I just have to get more characters but the first two sentences were the answers.

What is one possible cross section of a sphere ?

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The correct answer for that would be a circle, because a circle is perfectly symmetrical all the way around

A triangle has an angle that measures 80°. The other two angles are in a ratio of 7:13. What are the measures of those two angles?

Answers

The angles are B and C.


The three angles add up to 180º
A=80º
B
C

A+B+C=180º
80º+B+C=180º
B+C=180º-80º
B+C=100º  (1)

The ratio between A and B is 7/13 ; therefore:
B/C=7/13  ⇒B=7C/13    (2)

With the equations (1) and (2), we make a system of equations:

B+C=100
B=7C/13

We can solve this system of equations by substitution method:
7C/13  + C=100
least common multiple=13
7C+13C=1300
20C=1300
C=1300/20
C=65

B=7C/13
B=7*65/13
B=455/13
B=35º

Answer: The measures of those two angles are 65º and 35º.