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lianna [129]
3 years ago
13

Evaluate the expression for p=-2, q=6, and r= -10. -p2-4q+r2 The answer is ?

Mathematics
1 answer:
melomori [17]3 years ago
3 0

Answer:

-2^2-4(6)+-10=

4-24-10=

4-35=-30

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Evaluate 24nk if n= 6 and k = 8
saul85 [17]
<h2>1152</h2>

24nk

n=6

k=8

24 × (6) × (8)

24 × (48) = 1152

4 0
3 years ago
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Select the functions that have a value of -1. sin270° cos270° tan270° csc270° sec270° cot270°
stealth61 [152]

sin 270° has the value of -1 sweety

5 0
3 years ago
Charlie guesses that his dog weighs 34. 5 pounds. The dog actually weighs 32. 7 pounds. What is the percent error in Charlie’s g
expeople1 [14]

Percent error is the amount of error to actual value, in percent. The percent error in Charlie’s guess is approximately: Option D: 5.5%

<h3>How to calculate the percent error?</h3>

Suppose the actual value and the estimated values after the measurement are obtained. Then we have:

Error = Actual value - Estimated value

To calculate percent error, we will measure how much percent of actual value, the error is, in the estimated value.

\rm Percent \: Error = |\dfrac{Error}{Actual value}|\times 100 \\\\Percent \: Error = | \dfrac{\text{(Actual Value - Estimated Value)}}{Actual value}|\times 100 \\

(here |x| is such that it makes x non negative, thus, |-5| = 5, and |5| = 5)

For the given case, it is specified that:

Actual weight of dog = 32.7 pounds

Guessed weight of dog, by Charlie : 34.5 pounds.

Error = 32.7 - 34.5 = -1.8 pounds

Thus, percent error in Charlie's guess is calculated as:

\text{Percent Error} = |\dfrac{-1.8}{32.7}| \times 100 \approx 5.5\%

Hence, the percent error in Charlie’s guess is obtained approximately is given by: Option D: 5.5%

Learn more about percent error here:

brainly.com/question/25749180

3 0
2 years ago
A map has a scale of 1:200000 How far is it from Belfast to Larne in Km if the distance on the map is 7.8cm
vivado [14]

Answer:

15.6km

Step-by-step explanation:

Given the map scale 1:200000

1cm on the map represents 200000 cm on ground or in actual distance

Hence, if distance from Belfast to Larne is 7.8vm on map ;

Actual distance will be :

7.8 * 200000 = 1560000 cm

Converting to km :

Recall :

1000 m = 1km

100 cm = 1 m

Hence,

100000 cm = 1km

Therefore, (1560000 / 100000) km

= 15.6km

Hence, distance between Belfast and Larne is 15.6km

6 0
2 years ago
Dave wants to buy a bike for $180. He has $40. Dave mows lawns for $10 per lawn.
LenaWriter [7]

Answer:

180 = 40 + 10x

Step-by-step explanation:

5 0
2 years ago
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