Whats x squared minus 4x minus 45

Answers

Answer 1

Answer: X^2-4x-45. Factor it to find x. The product of 1 and -45 is -45. Use product sum method to get X^2-9x+5x-45. Now factor by grouping. x(x-9)+5(x-9). You then get (x+5)(x-9)=0 Now use zero product property x+5=0 and x-9=0 and you get x=-5 and x=9.

Answer 2

Answer: $x^(2) -4x-45$
=(x-9)(x+5)

you should get the same answer when you foil it using the FOIL method.
FOIL method is first, outer, inner, last (multiply). I hope it helps!

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I need some help with a Math question. I'm not sure how to work it out. All help appreciated.If a helicopter at 2000 meters begins to descend at 3 meter per second, how far is the helicopter from the ground after a minute and a half?

Answers

since there are 90 seconds in a minute and a half you multiply 90 by 2 getting 270 then you subtract 270 from 2000 and you get 1730 meters which is your answer hope this helps!

A swimmer dives to 65 feet below the surface of the ocean. Write the integer that represents the depth of the dive

Answers

Answer:

The integer is -65

Step-by-step explanation:

Hope that helps

Answer:The integer is -65

What is 11.25 rounded to the nearest hundredth

Answers

11.25 rounded to the nearest hundredth is 11.25
The 2 is in the tenths place, and the five is in the hundredths place. In order to round to the nearest hundredth, there must be a thousandths number to determine it, which there is not.

Simplify 7(n - p) + 5p.

Answers

7(n - p) + 5p
7n - 7p + 5p
7n - 2p

7(n-p) +5p
remove ( ) and distribute 7
7n-7p+5p
combine like terms
7n-2p

hope this helps

Sarah wants to give the pizza delivery boy a 20 percent tip. If the pizza bill is $48.25, how much should she tip?

Answers

If Sarah orders a pizza worth of $48.25 and she wants to offer 20 percent of the bill, then she needs to calculate the 20 percent of the total bill. 20 percent of $48.25 = 9.65 That mean Sarah should give $9.65 tip to pizza delivery boy.

9.65 round it up to 10. the answers A.

Solve for y

3x + 3y = 45

Answers

Answer:

y=15-x

Step-by-step explanation:

3y=45-3x

y=15-x

If you want to solve for y, you need another one equation

Answer:

y = -x + 15

Step-by-step explanation:

Subtract 3x from each side (left and right side of the equal sign) which will leave you with 3y = -3x + 45. Then divide everything by 3 which gets you

y = -x +15

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