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aivan3 [116]
3 years ago
13

Evaluate the expression when a = 7 and c= -4. -a+5c pls help

Mathematics
1 answer:
charle [14.2K]3 years ago
4 0

Answer:

-27

Step-by-step explanation:

a = 7 and c = -4

- a + 5 c

- ( 7 ) + 5 ( - 4 )

- 7 - 20

- 27

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What is the estimate the product of 324 × 26 pls help me I forgot how to estimate​
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Answer:

(Not only one answer)

Step-by-step explanation:

Estimate means to round in a way.

I would do this by making the equation to ...

320 x 20

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5 0
3 years ago
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Joshua uses his thermometer and finds the boiling point of ethyl alcohol to be 75 degrees Celsius. He looks in a reference book
MissTica

Answer:

6.25%

Step-by-step explanation:

Percent error is calculated by taking the difference of measured value and correct value divided by correct value and multiplied by 100%.

Mathematically,

Percent error = (correct value - measured value)/correct value  * 100%

_________________________________________________

in the problem given

measured value = 75 degrees Celsius

correct value = 80 degrees Celsius ( as given in reference book)

thus,

Percent error = (80 - 75)/80 * 100%

Percent error = (5/80 )* 100% = 6.25%

Percent error calculated by him is  6.25%.

4 0
3 years ago
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Thepotemich [5.8K]
M=20/7
Hope that helps
5 0
3 years ago
HELPP <br> -1-3(5m+8) ≥-85<br> i need help :D
forsale [732]

Answer:

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6 0
3 years ago
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stiks02 [169]

Answer:

I don't know

Step-by-step explanation:

thanks for the points

7 0
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