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GenaCL600 [577]
2 years ago
13

I did the no question and 86 through 88

Mathematics
2 answers:
EleoNora [17]2 years ago
8 0
86. D
87. H
88. Quadrant II
kolbaska11 [484]2 years ago
4 0
86. D. -10
87. H. -6, -3, 0, 2
88. Quadrant 1
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In one semester, doug and Laura spent a combined 250 hours in the tutoring lab. If doug spent 40 more hours in the lab then Laur
aksik [14]

Answer:

Step-by-step explanation:

What we have is a general equation that says this in words:

Laura's hours + Doug's hours = 250 total hours

Since we don't know either person's number of hours, AND since we can only have 1 unknown in a single equation, we need to write Laura's hours in terms of Doug's, or Doug's hours in terms of Laura's.  We are told that Doug spent Laura's hours plus another 40 in the lab, so let's call Laura's hours "x".  That makes Doug's hours "x + 40".  Now we can write our general equation in terms of x:

x + x + 40 = 250 and

2x = 210 so

x = 105

Since Laura is x, she worked 105 hours in the lab and Doug worked 40 hours beyond what Laura worked.  Doug worked 145.  As long as those 2 numbers add up to 250, we did the job correctly.  105 + 145 = 250? I believe it does!!

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3 years ago
What is the value of 4x^2 + 5x . when x = 1
Lynna [10]

Answer:

9

Step-by-step explanation:

Just substitute the value of x onto the x variables in the equation

; 4(1)^2 + 5(1)

; 4 + 5

; 9

7 0
3 years ago
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On the way to school, a student rides his bike to the bus stop. He then waits a few minutes for the bus to come and rides the bu
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Answer:

here is the sample answer

Sample Response: No, the graph is only increasing while the student rides his bike, rides the bus, and walks. It is stays the same while he waits for the bus and when the bus stops to let him off.

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3 years ago
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Please help asap!
allochka39001 [22]

Answer:

  See below

Step-by-step explanation:

The solution choices all agree that x = 1±√2. The second equation tells you ...

  y = ±2√(x+2)

so the sign of the √2 term in x is the same as the sign of the √2 term in y. The answer choices circled in red are the ones that meet this requirement.

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3 years ago
How many real solutions does 40 have
Alex777 [14]

Answer: one, 40 is a real number

Step-by-step explanation:

4 0
3 years ago
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