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2 years ago

Factor b^4 - 2b^2 - 63

Mathematics

2 answers:

11111nata11111 [884]2 years ago

5 0

The answer
(b-9) and (b+7)

Andrej [43]2 years ago

4 0

Answer:

( b − 9 ) ( b + 7 )

Step-by-step explanation:

Find two number that multiplies - 63 and add - 2

9 & 7 are both the greatest common factor

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Solve the following system of equations algebraically:<br> y = x^2+7x−4 <br> y = −x−4

oksian1 [2.3K]

Y = x² + 7x - 4
y = -x - 4

x² + 7x - 4 = -x - 4
+ x + x
x² + 8x - 4 = -4
+ 4 + 4
x² + 8x = 0
x(x) + x(8) = 0
x(x + 8) = 0
x = 0 or x + 8 = 0
   - 8 - 8
x = -8

  y = -x - 4
  y = -0 - 4
  y = 0 - 4
  y = -4
(x, y) = (0, -4)
or
y = -x - 4
y = -(-8) - 4
y = 8 - 4
y = 4
(x, y) = (-8, 4)

The solutions are (0, -4) and (8, -4).

7 0

2 years ago

Read 2 more answers

X+y=13 and 1/2x+y=10

photoshop1234 [79]

X=6
y=7

6+7
= 13

1/2(6) + 7
= 3 +7
=10

6 0

3 years ago

Evaluate the expression 3x^2+4x^3 when x=4.

larisa [96]

Step-by-step explanation:

304

plug 4 in for x

3(4)^2 + 4(4)^3 = 304

48 + 256 = 304

6 0

2 years ago

The formula m = 12,000 + 12,000rt 12t gives Keri's monthly loan payment, where r is the annual interest rate and t is the length

alexandr1967 [171]

Answer:

$240

Step-by-step explanation:

Fill in the given numbers and do the arithmetic.

$m=\dfrac{12,000+12,000rt}{12t}=\dfrac{12,000+12,000\cdot 0.04\cdot 5}{12\cdot 5}\\\\m=\dfrac{14,400}{60}=240$

Keri's monthly loan payment is $240 per month.

3 0

2 years ago

Read 2 more answers

Tu went to the movies. he bought 2 tickets for $ 9.50 each, popcorn for $ 5.00, and 2 drinks for $ 4.25 each. He give the clerk

alexandr1967 [171]

Answer:

Option A - $ 40.00 - $9.50 - $4.25 - $5.00

Step-by-step explanation:

Given : Tu went to the movies. he bought 2 tickets for $ 9.50 each, popcorn for $ 5.00, and 2 drinks for $ 4.25 each. He give the clerk two $ 20.00 bills.

To find : Which expression can not be used to find the amount of changes Tu got?

Solution :

He give the clerk two $ 20.00 bills i.e. $2\times 20$ or 40