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3 years ago

Evaluate 2r (t – 1) ifr = 4 and t = 6

Mathematics

2 answers:

Dominik [7]3 years ago

5 0

Answer:

Step-by-step explanation:

2r (t – 1)

Let r= 4 and t = 6

2*4 ( 6-1)

PEMDAS says parentheses first

2*4(5)

Then multiply from left to right

8 ( 5)

garri49 [273]3 years ago

4 0

Answer:

Step-by-step explanation:

Step 1: Define

2r(t - 1)

r = 4

t = 6

Step 2: Substitute and Evaluate

2(4) · (6 - 1)

8 · 5

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Please help with this will give brainliest to the first answer!

kozerog [31]

Answer:

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Step-by-step explanation:

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2 years ago

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3 years ago

A candle burned at a steady rate. After 33 minutes, the candle was 11.2 inches tall. Eighteen minutes later, it was 10.75 inches

Amiraneli [1.4K]

Answer:

9.025 inches

Step-by-step explanation:

Let the length be represented by:

$L = mt+L_0$

Where $L$ is the length of candle at time $t$

$m$ is the rate at which the candle is burning.

And $L_0$ is the initial length of the candle.

As per the question statement, let us put the given values in the equation.

$11.2 = m\times 33 + L_0 .... (1)\\10.75 = m\times 51+L_0 ..... (2)$

Subtracting (1) from (2):

$0.45 = -18m\\\Rightarrow m = -0.025$

Putting the value of $m$ in the equation (1):

$11.2 = -0.025 \times 33+L_0\\\Rightarrow L_0 = 12.025$

Therefore, the equation becomes:

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2 years ago

Describe and correct the error made in solving the system of equations by elimination

lesya692 [45]

The mistake was when she multiplied the 2nd equation by 5, she forgot to also multiply that last number 10 by 5 as well.

correction :
5x + 3y - z = 15
-x + 2y + 3z = 10...multiply by 5
---------------------
5x + 3y - z = 15
-5x + 10y + 15z = 50 (result of multiplying by 5)
--------------------add
13y + 14z = 65

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3 years ago