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Katena32 [7]
3 years ago
9

Help! This is for my test review

Mathematics
1 answer:
tatiyna3 years ago
4 0

Answer:

Number 18 is 171 or (B).

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The sum of the vectors 18N forward and 20N back is
Elden [556K]

Answer:

C. Back 2N

Step-by-step explanation:

Let forward vectors be positive (+) and backward vectors be negative.

Now take the net force of the two vectors.

=> (+18) + (-20)

=> (-2)

=> (-) Negative sign indicates it backwards and magnitude is 2

=> Therefore sum of vectors is back 2N.

4 0
3 years ago
What is the missing value for x?
kobusy [5.1K]

Answer:

10=30

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3 years ago
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Determine the domain of the function.<br><br> f(x)=4/x^2
harkovskaia [24]
Since x can be any value as long as the denominator equals 0 (it doesn't matter if it's positive or negative), we have to figure out when x^2=0, which is when x=0. Therefore, the domain is (-inf, 0) U (0, inf) 
3 0
3 years ago
Line a is parallel to line b, m∠1=2x+44 and m∠ 5=5x+38 Find the value of x.
Mumz [18]
<span>Line a is parallel to line b:
</span><span>m∠1=m∠ 5, because they are correspondent angles, then:
2x+44=5x+38
Solving for x:
2x+44-2x-38=5x+38-2x-38
6=3x
3x=6
Dividing both sides of the equation by 3
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8 0
3 years ago
convert the mixed numbers to improper fractions. this will get you one step closer to finding the unit rate
Kaylis [27]
It means for example instead of writing 2 2/5 You would write 12/5
You can find out an improper fraction by simply multiplying the denominator by the front number and adding the answer to you numerator
So, 2x5= 10. 10+2= 12. So 12/5
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3 years ago
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