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4 years ago

8

Danny is opening a savings account with an

1 answer:

Phoenix [80]4 years ago

8 0

Well the equation is y= 3x + 45. Your starting point is 45 because he started with depositing 45 bucks. The 3 represents how much he earns each day so it’s constant

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Solve (x + 1)2 – 4(x + 1) + 2 = 0 using substitution.

solniwko [45]

For this case we have to:

Let $u = x + 1$

So:

$u ^ 2-4u + 2 = 0$

We have the solution will be given by:

$u = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2 (a)}$

Where:

$a = 1\\b = -4\\c = 2$

Substituting:

$u = \frac {- (- 4) \pm \sqrt {(- 4) ^ 2-4 (1) (2)}} {2 (1)}\\u = \frac {4 \pm \sqrt {16-8}} {2}\\u = \frac {4 \pm \sqrt {8}} {2}\\u = \frac {4 \pm \sqrt {2 ^ 2 * 2}} {2}\\u = \frac {4 \pm2 \sqrt {2}} {2}$

The solutions are:

$u_ {1} = \frac {4 + 2 \sqrt {2}} {2} = 2 + \sqrt {2}\\u_ {2} = \frac {4-2 \sqrt {2}} {2} = 2- \sqrt {2}$

Returning the change:

$2+ \sqrt {2} = x_ {1} +1\\x_ {1} = 1 + \sqrt {2}\\2- \sqrt {2} = x_ {2} +1\\x_ {2} = 1- \sqrt {2}$

Answer:

$x_ {1} = 1 + \sqrt {2}\\x_ {2} = 1- \sqrt {2}$

3 0

3 years ago

Read 2 more answers

Simplify -4(-9p + -3) +2(-2p + 6)

zalisa [80]

Answer:32p+24

Step-by-step explanation:

-4(-9p + -3) +2(-2p + 6)

36p+12-4p+12

32p+24

Hope it helped you

4 0

3 years ago

Solve the following equation

Eva8 [605]

-4y + 8 = 8y -8 + 32 - 16y
-4y +8 = -8y +24 +8y
4y + 8 -8= 24
4y = 16
Y = 4

7 0

4 years ago

Jen pours out 6 ounces of water from a full bottle. She estimates that she poured out 20% of the water in the bottle. About how

faust18 [17]

Answer:

30 ounces i think

Step-by-step explanation:

20% times 5 = 100%

6 in every 20%

since there is 5 20%'s, multiply 6 times 5 and you get 30

7 0

3 years ago

What is the value of x given that figure LMNO is a square

NARA [144]

I got Y=12 for my answer.

6 0

3 years ago