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AysviL [449]
3 years ago
10

a.) Simplify the following expression: (9x2+2x−5)+(6x2−5x+4)(9x2+2x-5)+(6x2-5x+4) b.) Explain how you know your answer is correc

t.
Mathematics
1 answer:
MatroZZZ [7]3 years ago
3 0
54x4-12x3-30x2-45x3-10x2+25x+9x2+2x-5+6x2-5x+4= 54x4-57x3-25x2+22x-1. This is the correct answer because I distributed the first parentheses to the second. then from there you combine like terms.
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It would be nice if I get some help with these 2 things
Stella [2.4K]
Thing 1
A. You can set up a proportion by dividing how much of something there is by the original. (This probably doesn't make much sense but I hope you can understand it from the answer to the problem below!)
B.First, do 168/21 to see how many more times he put flour in. 
168/21= 8
Then to find out the milk in the same proportion do the number (in this case 8) times the original of the thing you wan to find out. 
8x9=72
72 tablespoons of milk are needed for 168 cups of flour in this adapted recipe.

Thing 2
24/36=8y
To solve any equation, you want to have letters on one side and numbers on the other, so...
-8 from both sides...
(24/36)-8=y
24/36=0.6 
y=(0.6-8)
y=-7.4

Hope this helps :)
5 0
3 years ago
Find x, y, z, so that 41, 46, x, y, z has a mean of 50 and a mode of 45
nevsk [136]

Answer:

Step-by-step explanation:

as mode is 45 ,two of three is 45

i assume x =y=45

now (41+46+45+45+z)/5=50

177+z=50×5=250

z=250-177=73

so x=45

y=45

z=73

5 0
2 years ago
Read 2 more answers
Solve for q. –10 + 10q = 9q
Kitty [74]

Answer:

q= 10

Step-by-step explanation:

9q - 10q = -10

-q = -10

q= -10/-1 = 10

6 0
3 years ago
Read 2 more answers
What is aproxímate percent change in a temperature that went down from 120 degrees to 100 degrees
Papessa [141]

Answer:

16.7 percent

Step-by-step explanation:

you must find what percent 100 is of 120 and then subtract that percentage from 100

6 0
3 years ago
The price of a beach canopy tent is
Elodia [21]

Answer:

The price decreased by 12.5%

Step-by-step explanation:

150/120 = 1.25

1.25 x 10 = 12.5

8 0
2 years ago
Read 2 more answers
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