3 years ago

Factor completely and then place the factors in the proper location. a 2 - a - 20?

2 answers:

4 0

This is a notable trinomial.

You have to find two numbers which summed give 1 and multiplied give 20.

In this case +4 and -5

-5+4 = -1(a)

-5*4 = -20

So (a+4)(a-5)

alexandr1967 [171]3 years ago

3 0

Answer: (a-5)(a+4)

Step-by-step explanation:

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never [62]

-2.5f-22 i think i’m not sure though

7 0

3 years ago

Store A sells a watch for $50 and offers a 5% discount. Store B sells the same watch for $60 and offers a 20% discount. The sale

marta [7]

Store A
50*5%=2.5
50-2.5=47.5
47.5+(6%*47.5)=$50.35
Store B
20%*60=12
60-12=48
48+(6%*48)=$50.88
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4 0

3 years ago

How much of an alloy that is copper should be mixed with ounces of an alloy that is copper in order to get an alloy that is cop

tekilochka [14]

Answer:

1r + 8(400) = 3(r+400)

1r + 320 = 3r + 120

2r = 200

r = 200 / 2 = 1000

1400 * 3 = 420

100 + 320 = 420

Step-by-step explanation: