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arsen [322]
3 years ago
7

In a particular classroom, a student who did not study scored 60 points on a test. If that student scored 90 points when studyin

g for three hours, what is the rate of change of his score per hour studied?
Mathematics
1 answer:
Oksanka [162]3 years ago
5 0
30 points over 3 hours equals: 10 points/hr
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Simplify each each expression. If not possible, write simplified.
Harman [31]
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9. 3x^2+x
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6 0
4 years ago
An anthropologist studies a woman's femur that was uncovered in Madagascar. To estimate the woman's height, he uses the equation
Norma-Jean [14]

Answer:

The inequality best represents the length of the femur that would suggest the woman had a height greater than 160 cm is:

f > 40

Step-by-step explanation:

Woman's height (cm): h = 60 + 2.5 f

Length of the femur (cm): f


Height greater than 160 cm:

h > 160

Replacing h by 60+2.5f in the inequality above:

60+2.5f > 160

Solving for f: Subtracting 60 both sides of the inequality:

60+2.5f-60 > 160-60

Subtracting

2.5f > 100

Dividing both sides of the inequality by 2.5:

2.5f/2.5 > 100/2.5

f > 40

Answer: The inequality best represents the length of the femur that would suggest the woman had a height greater than 160 cm is:

f > 40


5 0
3 years ago
The sum of two numbers is 45 and the difference is 3. What are the numbers?​
AVprozaik [17]

Answer:

24 and 21 are the two numbers

Step-by-step explanation:

let n represent the unknown number

let n-3 represent the second unknown number

n+n-3 = 45

2n-3=45

2n=45+3

2n=48

n=48/2

n=24

n-3=21

CHECK: 24+21=45

.˙. the first number is 24 and the second number with a difference of 3 is 21

5 0
3 years ago
In a plane, line b is parallel to line f, line f is parallel to line g, and line h is perpendicular to line b.
ehidna [41]

The statement that cannot be true is that g cannot be parallel to h (g ║h)

<h3>How  to know parallel lines in a plane?</h3>

On the plane ,

line b is parallel to line f.

Therefore,

b ║ f

line f is parallel to line g,

Therefore,

f ║ g

line h is perpendicular to line b.

h ⊥ b

Therefore,

Since line h is perpendicular b, line b is perpendicular to h.

b can be parallel to g on the plane.

g cannot be parallel to h because h is perpendicular to b.

h can be perpendicular to f because b is parallel to f.

learn more parallel lines here: brainly.com/question/3443478

#SPJ1

8 0
2 years ago
I NEED HELP THIS HW IS DUE TODAY​
Alja [10]
2(a) 6a-2b+5
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3. x-2

(Could you tell me the question of the first part pls)
7 0
3 years ago
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