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3 years ago

Distribute: 3(2a – 4b)

Mathematics

2 answers:

Pavlova-9 [17]3 years ago

8 0

Answer:

6a - 12b

Step-by-step explanation:

3(2a - 4b)

3 times 2a = 6a

3 times negative 4b = -12b

6a - 12b

olga_2 [115]3 years ago

4 0

Multiply each term in the parentheses by 3. Your answer is 6a - 12b

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Solve the equation 5x^{2}-3x-1= 0 to the nearest tenth.

Nat2105 [25]

Answer:

Step-by-step explanation:

Answer:

−

5 0

3 years ago

The same architect wants to draw a room that has an area of 175 ft². What will be the area of the room in his drawing in square

Dominik [7]

Answer:

25,200in²

Step-by-step explanation:

The architect wants to draw a room that has an area of 175 ft². We need to find this measurement in square inches.

Square feet and square inches are different from feet and inches.

We should know that a square foot is 144 square inches.

Multiply 175 * 144.

$175 * 144=25200$

So the same architect wants to draw a room that should have an area of 25,200in².

Brainilest Appreciated.

3 0

3 years ago

10. A perfect circle measuring 38 feet across was discovered on Brickell Avenue in Miami in 1998. Known as the Miami Circle at B

vivado [14]

Using an exponential function, it is found that the Tequesta settlement is 1845 years old.

<h3>What is an exponential function?</h3>

The exponential equation for a decaying amount of a substance is given by:

$A(t) = A(0)e^{-rt}$

In which:

A(0) is the initial value.

r is the decay rate, as a decimal.

Researching on the internet, the half-life of carbon 14 is of 5,730 years, hence A(5730) = 0.5A(0), which we use to find r.

$A(t) = A(0)e^{-rt}$

$0.5A(0) = A(0)e^{-5730r}$

$e^{-5730r} = 0.5$

$\ln{e^{-5730r}} = \ln{0.5}$

$5730r = -\ln{0.5}$

$r = -\frac{\ln{0.5}}{5730}$

$r = 0.00012096809$

Hence, the equation is:

$A(t) = A(0)e^{-0.00012096809t}$

The wood chips were found to contain 80% of the atmospheric carbon-14, hence we have to find t for which A(t) = 0.8A(0).

$A(t) = A(0)e^{-0.00012096809t}$

$0.8A(0) = A(0)e^{-0.00012096809t}$

$e^{-0.00012096809t} = 0.8$

$\ln{e^{-0.00012096809t}} = \ln{0.8}$

$-0.00012096809t = \ln{0.8}$

$t = -\frac{\ln{0.8}}{0.00012096809}$

$t = 1845$

The Tequesta settlement is 1845 years old.

You can learn more about exponential functions at brainly.com/question/25537936

8 0

2 years ago

Suppose you have a 1/10 chance of winning with a scratch-off lottery ticket. If you buy 4 tickets, what is the probability of wi

xz_007 [3.2K]

1/10 chance on winning with 1 ticket...so winning with 4 tickets =
1/10 * 1/10 * 1/10 * 1/10 = 1/(10^4) = 1/10,000

4 0

3 years ago

Read 2 more answers

Solve the equation. -3x +.1 + 10x = x + 4 N olu R X = 18

zheka24 [161]

Answer:

Hence after solving the given equation we get x = 13/20.

Step-by-step explanation:

Given:

-3 x + 0.1 + 10 x = x + 4

-3 x + 10 x - x = 4 - 0.1

6 x = 3.9

x = $\frac{3.9}{6}$

x = $\frac{1.3}{2}$

x = $\frac{13}{20}$

6 0

3 years ago