2 years ago

What is (2a-1)(8a-5)

Mathematics

1 answer:

Umnica [9.8K]2 years ago

5 0

Answer:

$16a^{2} - 18a + 5$

Step-by-step explanation:

1) Use the grid method to expand the two brackets

2) Collect like terms

3) Form the statement!

(See attached image)

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PLEASE SOMEONE HELP I TRULY DO NOT UNDERSTAND

IceJOKER [234]

Hi there!

$\large\boxed{f^{-1}(x) = \sqrt[3]{\frac{x+4}{9} } }$

$f(x) = 9x^{3} - 4$

Find the inverse by replacing f(x) with y and swapping the x and y variables:

$x = 9y^{3} - 4$

Isolate y by adding 4 to both sides:

$x + 4 = 9y^{3}$

Divide both sides by 9:

$\frac{x+4}{9}= y^{3}$

Take the cube root of both sides:

$y = \sqrt[3]{\frac{x+4}{9} }\\\\f^{-1}(x) = \sqrt[3]{\frac{x+4}{9} }$

7 0

3 years ago

Ahmad run 5 kilometres. If he completed 15% of the race. How many kilometres is the race?

stepladder [879]

Answer:

x = 33.33 kilometers

Step-by-step explanation:

you could make use of the percent, base, and rate formula here. we know that 15% is the rate, 5 kilometers is the percent, therefore what we are looking for is our base.

$\frac{percent}{base} =\frac{rate}{100}$

$\frac{5}{x}=\frac{15}{100}$ ; cross multiply.

15x = 500

x = 33.33 kilometers

therefore, the race is 33.33 kilometers.

4 0

3 years ago

Read 2 more answers

anthonyś yearly budget for the furniture in his house is $18,000 he spent 9% of the budget on the family room how much did he sp

nata0808 [166]

Answer:

$1620

Step-by-step explanation:

9% of budget = 0.09 × $18000 = $1620

Anthony spent $1620 on the family room.

3 0

2 years ago

Which statements are true

Lemur [1.5K]

Answer:

Step-by-step explanation:

A is the answer A is the answer

5 0

3 years ago

Darryl has written 60 percent, or 12 pages, of his history report. Darryl wants to figure out how many total pages he needs to w

Valentin [98]

Answer:

total pages = 20

Step-by-step explanation:

60% of an unknown number is 12

Let the unknown number (total pages) be x.

60/100 of x = 12

60/100 * x = 12

3/5 x = 12

x = 12 * 5/3

x = 20

8 0

2 years ago

Read 2 more answers