3 years ago

If a(x + 1) + b(x − 1) − 2 = 0 for all real x, then a =

Mathematics

1 answer:

jek_recluse [69]3 years ago

7 0

Answer:

D) 1

Step-by-step explanation:

using the distributive property we have ax+a+bx-b-2=0. because the equation is true for all real x, ax=-bx. this means a-b-2=0 and a=-b. a-b-2=0 becomes a=b+2. then we substitute a for -b and get -b=b+2 which becomes 2b=-2 so b=-1. since a=-b, a=1

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The number A of tablet computers sold (in millions) can be modeled by the function A=4.5t2+43.5t+17 , where t represents the num

Rina8888 [55]

The problem indicates that A represents the number of tablet computers sold in millions. So, if 65 million were sold, we must substitute A = 65 to the equation. Then, we find for t.

65 = 4.5t² +43.5t + 17
Solving for t using a calculator,
t = 1 and -10.67

Let's take the positive root. So, t=1.
That means the year would be 1 year after 2010. <em>Therefore, the answer is 2011.</em>

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3 years ago

A television Mark 1600 was sold for 1200 what percent discount was given on that television

adoni [48]

Answer:

25%

Step-by-step explanation:

Discount = 1600 - 1200 = 400

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3 years ago

What’s 4.5 rounded to the nearest whole number

KiRa [710]

Answer:

Step-by-step explanation:

we take the 5 behind the four and it rounds up to a 5

4.5=5

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3 years ago

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fgiga [73]

It would be 5850 hope you get it right:)

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3 years ago

What is the answer to -2x+3=x-6 ?

saveliy_v [14]

Answer:

x=3

Step-by-step explanation:

-2x+3=x-6

-3x+3=-6

-3x=-9

-x=-3

x=3

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3 years ago