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AveGali [126]
2 years ago
11

I need help on this 6th grade math problem

Mathematics
2 answers:
Strike441 [17]2 years ago
6 0

Answer: B) 12.5

Step-by-step explanation:

Start by isolating x by subtracting 2.5 from both sides

x+2.5 < 20\\x+2.5-2.5 < 20-2.5\\x < 17.5

This reads as "x is less than 17.5"

D can be eliminated because it is greater than 17.5

C can be eliminated because 17.5 can't be less than itself

So the answer must be B since it is less than 17.5 and greater than A

vivado [14]2 years ago
4 0

Answer: x<17.5

Step-by-step explanation:

Subtract  from both sides: x+2.5-2.5<20-2.5

Simplify the arithmetic: x<20-2.5

Simplify the arithmetic: x<17.5

Hope it helps!

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1. 6 multiplied by y plus 10
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5 0
4 years ago
I need help finding this question out
alekssr [168]

Answer:

I think the first answer 2 would be the slope and the 1 would be the intercept and for the second one the answer is 5 would be the slope and the other 5 would be the intercept.

Step-by-step explanation:

4 0
3 years ago
Use a calculator to find the approximate value of arccos(0.67). 42.07° 33.82° 84.13° 47.93°
Solnce55 [7]
Arccos is the same thing as inverse cosine which is used when you are looking for an angle measure.  Make sure your calculator is in degree mode.  Hit 2nd button then cos and you will see this on your screen: cos ^{-1} ( and it is following the parenthesis there that you will enter your decimal.  The inverse cosine of .67 is an angle measure of 47.93°
4 0
3 years ago
Plz help plz I need it
tatuchka [14]

Answer:

c

Step-by-step explanation:

50×1=50

50×3=150

50×4=200

50×5=250

6 0
3 years ago
Suppose a purchasing manager wants to determine the average cost of machined metal parts in the US. How many machined metal part
Flauer [41]

Answer:

they will have to sample 60 machined metal parts

Step-by-step explanation:

Given that;

Margin of Error E = 6.74

at 90% Confidence Interval, z = 1.645  { from table }

Range R = maximum range - minimum range = 220 - 93 = 127

standard deviation σ = R / 4 = 127/4= 31.7500

How many machined metal parts would they have to sample n = ?

to get our sample size, we use the following formula

n = [ zσ / E ]²

we substitute in our values

n = [ 1.645 × 31.7500 / 6.74 ]²  

n = [ 52.2287 / 6.74 ]²  

n = [ 7.7490 ]²          

n = 60.047 ≈ 60  

Therefore, they will have to sample 60 machined metal parts

5 0
3 years ago
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