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-Dominant- [34]
3 years ago
11

What is r i 4.5+10r=-6.5 with work pls

Mathematics
1 answer:
Evgen [1.6K]3 years ago
8 0

Answer:

-11/10 or -1.1

Step-by-step explanation:

To start, let's get rid of those pesky decimals by multiplying everything by 2. Then we get 9 + 20r = -13. Now, let's isolate the r by subtracting 9 from both sides to get 20r = -22. Finally, we need to divide everything by 20 to get r = -11/10 or -1.1.

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PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
Alinara [238K]

Answer:  a) 6

<u>Step-by-step explanation:</u>

The mean is 375 which has a z-score of 0.

The standard deviation is 24 so:

  • z-score of 1 is: 375 + 24 = 399
  • z-score of 2 is: 399 + 24 = 423
  • z-score of 3 is: 423 + 24 = 477

A z-score of 3 is 99.85% from the left <em>(or 1 - 99.85% from the right = 0.15%)</em>

Since we are looking for the "more than" a z-score of 3, it is 0.15% of the total.

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<u>× 0.0015</u>

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6 0
3 years ago
Solve 2cos(x)-4sin(x)=3 [0,360]
Korvikt [17]
2cos(x) - 4sin(x) = 3

use identity  [cos(x)]^2 +[ sin(x)]^2 = 1 => cos(x) = √[1 - (sin(x))^2]

2√[1 - (sin(x))^2] - 4 sin(x) = 3

2√[1 - (sin(x))^2] = 3 + 4 sin(x)

square both sides

4[1 - (sin(x))^2] = 9 + 24 sin(x) + 16 (sin(x))^2

expand, reagrup and add like terms

4 - 4[sin(x)]^2 = 9 + 24sin(x) + 16sin^2(x)

20[sin(x)]^2 + 24sin(x) +5 = 0

use quadratic formula and you get sin(x) = -0.93166 and sin(x) = -0.26834

Now use the inverse functions to find x:

arcsin(-0.93166) = 76.33 degrees

arcsin(-0.26834) = 17.30 degrees






3 0
3 years ago
Trimming a garage door a carpenter used 30 ft of molding in three pieces to trim a garage door. if the long piece was 2 ft longe
Ksju [112]

Answer:

35

Step-by-step explanation:

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4 0
3 years ago
there are eight competitors in each ring for a raw kwon do to tournament if there are 96 competitors in the tournament how many
kvv77 [185]

Answer:

12

Step-by-step explanation:

You divide 96 by 8 and you get 12.

3 0
2 years ago
In the year 2005, a total of 750 fish were introduced into a manmade lake. The fish population was expected to grow at a rate of
tangare [24]
The population of the fish is given by P(t) = 750(1 + 0.083)^t; where t is the number of years after 2005.
Here, t = 2050 - 2005 = 45

Population in 2050 = 750(1.083)^45 = 750(36.16) = 27,123
8 0
3 years ago
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