Mathematics, 22.08.2019 07:00 jayrsauce

Which two numbers add up to and multiply to
1. multiply to -18 add to -17
2. multiply to 36 add to -13
3. multiply to -24 add to -5
4. multiply to -18 add to 7
5. multiply to -36 add to 9
6. multiply to 24 add to 10
7. multiply to 18 add to -9
8. multiply to -36 add to -16
i need asap!

Answers: 2

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Answers

Answer from: nena4200

It's quite simple :)
1. $-18\ \&\ 1$ because -18+1=-17

AND

2. $-9\ \&\ -4$ because -9+(-4)=-13

AND

3. $-8\ \&\ 3$ because -8+3=-5

AND

4. $9\ \&\ -2$ because 9+(-2)=7

AND

5. $12\ \&\ -3$ because 12+(-3)=9

AND

6. $6\ \&\ 4$ because 6+4=-10

AND

7. $-6\ \&\ -3$ because -6+(-3)=18

AND

8. $-18\ \&\ 2$ because -18+2=-16

AND

Answer from: snikergrace

Ok so let's start :)

Ok so first one, numbers need to add to

AND multiply to

First of all you need to check the signs which stands near to those numbers. As you see there is (-)

next to both of them, it means that ONLY one number needs to be with (-)

sign. Why? There is short "instruction" which you need to remember:

(-)*(-)=(+)

If there are to signs next to each other, you can "change" them using "rules" below ;P

(-)+(-)=(+)

So it is possible to add two numbers with (-)

sign next to them which would be equal to

(for example -5+(-12)

but it is impossible to find two numbers which have (-)

sign next to them which will give you also negative number after multiplication :)

Ok it's enough theory for now, it should be much easier now :D

1. So you can multiply 1*-18

which is

Also

which is

Rules above should help you to understand what I did below :) In case of any questions you can help me anytime :)

It's quite simple :)

1. $\ \boxed{-18\ AND\ 1}\ because\ -18+1=-17\ AND\ (-18)*1=-18$

2. $\ \boxed{-9\ AND\ -4}\ because\ -9+(-4)=-13\ AND\ (-9)*(-4)=36$

3. $\ \boxed{-8\ AND\ 3}\ because\ -8+3=-5\ AND\ (-8)*3=-24$

4. $\ \boxed{9\ AND\ -2}\ because\ 9+(-2)=7\ AND\ 9*(-2)=-18$

5. $\ \boxed{12\ AND\ -3}\ because\ 12+(-3)=9\ AND\ 12*(-3)=-36$

6. $\ \boxed{6\ AND\ 4}\ because\ 6+4=-10\ AND\ 6*4=24$

7. $\ \boxed{-6\ AND\ -3}\ because\ -6+(-3)=18\ AND\ (-6)*(-3)=18$

8. $\ \boxed{-18\ AND\ 2}\ because\ -18+2=-16\ AND\ -18*2=-36$

Answer from: Quest

use an equation of ratios to determine the amount of gas needed to fill the tank.

0.2 0.8

288.75 x

231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal $3

* = $3465 (answer)

1 1 gal

hope this you

Answer from: Quest

the inequality is:

250c+180g≥950

step-by-step explanation:

let c denotes the number of days in a week miyoko worked as a cryptographer.

and g denotes the number of days in a week she works as a geologist.

now we are given that she earns $250 for every day she works as a cryptographer,and earns $180 for every day she works as a geologist.

now miyoko's goal is to earn more than $950 this week.

hence, the inequality could be represented as:

250c+180g≥950

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Which two numbers add up to and multiply to
1. multiply to -18 add to -17
2. multiply...