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avanturin [10]
3 years ago
15

Simplify 19a - 28a² + 5

Mathematics
1 answer:
Reptile [31]3 years ago
8 0

Answer:

-28a² +19a+5

Step-by-step explanation:

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An experienced bricklayer can work twice as fast as an apprentice bricklayer. After the bricklayers work together on a job for 4
Veronika [31]

Answer:

7 hours.

Step-by-step explanation:

An experienced bricklayer can work twice as fast as an apprentice bricklayer. The apprentice needs 14, so 14/2=7

4 0
3 years ago
A commuter has to cross a train track each day on the way to work. The probability of having to wait for a train is .2. If she h
Anni [7]

Answer:

21 minutes

Step-by-step explanation:

Her expected commute time is given by the probability of having to wait for the train (0.2) multiplied by the commute time in this scenario (25 min), added to the probability of not having to wait for the train (1 - 0.2) multiplied by the commute time in this scenario (20 min). The expected commute time is:

E(X) = 0.2*25+(1-0.2)*20\\E(X) = 21\ minutes

Her expected commute time is 21 minutes.

7 0
3 years ago
How do I find the slope of a coordinate plane?
kolezko [41]
Look at the rise over run for it. That is the slope. Btw can u answer my last question thx
6 0
3 years ago
James, Reed, Spencer and Larry have 912 cups of trail mix for their hike. If they each eat the same amount of trail mix, how man
Damm [24]

Answer:

228 cups

Step-by-step explanation:

the cups each person will eat can be found by dividing the total number of trail  by the number of people who went on the hike

total number of people on the hike = 4

total cups of trail = 912

912 / 4 = 228 cups

8 0
3 years ago
Plz solve I’ve been stuck on how to start it and I just can’t
AleksAgata [21]

Answer:

x and y = 0

the question looks weird and almost wrong because when you subtract the equations, you are left with nothing

Step-by-step explanation:

Multiply the top equation by 3 to make the -x a -3x instead.

Then do the top equation - the bottom equation

At this point you should be left with x

7 0
3 years ago
Read 2 more answers
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