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Gnom [1K]
3 years ago
10

Please help me with these questions

Mathematics
1 answer:
adoni [48]3 years ago
8 0
Number one is a number 2 is c number 3 is D number for is be number six is d
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I keep forgetting the process for this: 3(x^2 + 5)(x^2 - 5) Can someone help?
Snezhnost [94]

Answer:

see explanation

Step-by-step explanation:

Note that (x² + 5)(x² - 5) are the factors of a difference of squares

a² - b²  = (a + b)(a - b)

with a = x² and b = 5, hence

(x² + 5)(x² - 5) = (x²)² - 5² = x^{4} - 25, thus

3(x^{4} - 25) = 3x^{4} - 75

5 0
3 years ago
What is the length of side BC? What is the length of side GH?
almond37 [142]
In this situation you would have to use ratios to figure it out.
AD over EH or 24/16 that would be equal to 1.5
This would show that BC over GF is also equal to 1.5.
6/4 is equal to 1.5.
Side length BC is 6
6 0
3 years ago
Andres went out to a restaurant for dinner. His total bill before tax and tip was $27.30. He was charged an additional 9% tax an
Fofino [41]

Answer:

$25.66

Step-by-step explanation:

Given data

Total Bill before tax and tip= $27.30

Tax= 9%

Tip= 15%

Let us find the tax

=9/100*27.30

=0.09*27.30

=$2.457

Let us find the tip

=15/100*27.30

=0.15*27.30

=$4.095

Therefore his bill after tax and tip is

=27.30+2.457-4.095

=$25.66

4 0
2 years ago
Find x<br><br> 9x+3+5x-2+11x-21=180
Bess [88]

Answer:

x = 8

Step-by-step explanation:

Simplifying

(9x + 3) + (5x + -2) + (11x + -21) = 180

Reorder the terms:

(3 + 9x) + (5x + -2) + (11x + -21) = 180

Remove parenthesis around (3 + 9x)

3 + 9x + (5x + -2) + (11x + -21) = 180

Reorder the terms:

3 + 9x + (-2 + 5x) + (11x + -21) = 180

Remove parenthesis around (-2 + 5x)

3 + 9x + -2 + 5x + (11x + -21) = 180

Reorder the terms:

3 + 9x + -2 + 5x + (-21 + 11x) = 180

Remove parenthesis around (-21 + 11x)

3 + 9x + -2 + 5x + -21 + 11x = 180

Reorder the terms:

3 + -2 + -21 + 9x + 5x + 11x = 180

Combine like terms: 3 + -2 = 1

1 + -21 + 9x + 5x + 11x = 180

Combine like terms: 1 + -21 = -20

-20 + 9x + 5x + 11x = 180

Combine like terms: 9x + 5x = 14x

-20 + 14x + 11x = 180

Combine like terms: 14x + 11x = 25x

-20 + 25x = 180

Solving

-20 + 25x = 180

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '20' to each side of the equation.

-20 + 20 + 25x = 180 + 20

Combine like terms: -20 + 20 = 0

0 + 25x = 180 + 20

25x = 180 + 20

Combine like terms: 180 + 20 = 200

25x = 200

Divide each side by '25'.

x = 8

8 0
2 years ago
Read 2 more answers
7th grade math help me please :))
mars1129 [50]

Answer:

Try 300

Step-by-step explanation:

Because one full order would be 20 dollars and 20 times 15 equals 300

3 0
2 years ago
Read 2 more answers
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