MATHEMATICS HIGH SCHOOL

I don't understand this help !
I don't understand this help ! - 1

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Answer 1
Answer: I hope this helps you
Answer 2
Answer: try using wolframalpha to help you on that one

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Factor using ac-method and factor completely, 25x²-30x--40  (help)

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25x^2-30x-40=\n 5(5x^2-6x-8)=\n 5(5x^2-10x+4x-8)=\n 5(5x(x-2)+4(x-2))=\n 5(5x+4)(x-2)
Answer :25x^2-30x-40 \n =5(5x^2-10x+4x-8) \n =5[5x(x-2)+4(x-2)] \n =5(x-2)(5x+4)

Pablo and his wife are each starting a saving plan. Pablo will initially set aside $50 and then add $40.75 every week to the savings. The amount A (in dollars) saved this way is given by the function A=50+40.75N, where N is the number of weeks he has been saving. His wife will not set an initial amount aside but will add $60.75 to the savings every week. The amount B (in dollars) saved using this plan is given by the function B=60.75N. Let I be total amount (in dollars) saved using both plans combined. Write an equation relating I to N. Simplify your answer as much as possible.​

Answers

Answer:

The equation relating the total amount saved (I) to the number of weeks (N) for both Pablo and his wife is I = 50 + 101.5N.

Step-by-step explanation:

To find the equation relating the total amount saved (I) to the number of weeks (N) for both Pablo and his wife, we need to add the amounts saved by each person.

For Pablo, the amount saved (A) is given by the function A = 50 + 40.75N, where N is the number of weeks. This means that after 1 week, Pablo will have saved $50 + $40.75, after 2 weeks, he will have saved $50 + 2($40.75), and so on.

For his wife, the amount saved (B) is given by the function B = 60.75N. This means that after 1 week, his wife will have saved $60.75, after 2 weeks, she will have saved 2($60.75), and so on.

To find the total amount saved (I) by both of them combined, we need to add the amounts saved by Pablo and his wife:

I = A + B

Substituting the given functions:

I = (50 + 40.75N) + (60.75N)

Simplifying, we combine like terms:

I = 50 + 40.75N + 60.75N

I = 50 + (40.75 + 60.75)N

I = 50 + 101.5N

So, the equation relating the total amount saved (I) to the number of weeks (N) for both Pablo and his wife is I = 50 + 101.5N.

What is –3 2/3 · (–2 1/4 )?

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-3(2)/(3)\cdot\left(-2\frac{1}4{}\right)=\n--------------------\nnegative\ number\ multiply\ by\ negative\ number\ is\ a\ positive\ number\n--------------------\n-3(2)/(3)\cdot\left(-2\frac{1}4{}\right)=3(2)/(3)\cdot2(1)/(4)=\n------------------------------\n

if you want to multiply mixed numbers you need to turn them into improper fractions

3(2)/(3)\cdot2(1)/(4)=(3\cdot3+2)/(3)\cdot(2\cdot4+1)/(4)=(9+2)/(3)\cdot(8+1)/(4)=(11)/(3)\cdot(9)/(4)=(11)/(1)\cdot(3)/(4)=(11\cdot3)/(1\cdot4)\n\center\boxed{=(33)/(4)=8(1)/(4)}

-x-4=9 ( find the x )

Answers

X=-13 
Because 9 plus 4 is 13 but x can't be negative so you divide my negative 1 and get x=-13 
You need to make x the subject. This means only x needs to be on one side of the equals sign.
-x-4=9
you need to keep x positive so +x on both sides (because it is the opposite of minus)
-4=9+x
minus the nine on both sides (because it is the opposite of adding)
-11=x
This is the answer.
-11=x

Alex and Ben were given a total of £360 they shared the money in the ratio 5:7 Ben received more money then Alex.how much more?

Answers

first
360 divided by 12=30
alex got=30 multiply 5=150
ben got=30 x 7 =210
so ben got 60 more than alex
5:7 means that Alex got 5/12 of the whole amount and Ben 7/12.
(5/12)•360=150
(7/12)•360= 210
210-150=60
Ben received £60 more than Alex.
Hope it helps :)

Pls help for brainliest answer

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