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cluponka [151]
3 years ago
13

I need help with number 3

Mathematics
1 answer:
sattari [20]3 years ago
4 0
You multiply everything inside the brackets by what's outside it:

24-30x + 9
33 - 30x

D is the answer.
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The table above summarizes the results of 100 students at Arboc High School who took the AP Chemistry test. If one of the survey
frosja888 [35]

Answer:

C. 0.79

Step-by-step explanation: Add yeses and nos together. Total students above average is 70.  55 took prep course. Divdide 55 by 70 and you get 0.79%

3 0
3 years ago
If 4 over 9 equals 2 over x , what do you know about their cross products?
goblinko [34]
If 4/9 = 2/x then my guess is x=18
4 0
4 years ago
Several surveys in the United States and Europe have asked people to rate their happiness on a scale of 3 = "very happy," 2 = "f
Rudik [331]

Answer:

Step-by-step explanation:

We have to find the reported happiness of person of family income of $25,000, $35,000 and $45,000

Given that the formula for finding relation between a people happiness and his income is

y = 0.065x - 0.613

a) find the happiness of person of family income os $25,000

we put x = 25 as in the equation above

y=0.065(25)-0.613\\\\=1.625-0.613\\\\=1.02 \approx 1

Hence, person happiness with with family income of $25,000 on a scale of 3 is y = 1

That means they come under catergory "not to happy"

b) Find the happiness of person of family income os $35,000

we put x = 35 as in the equation above

y=0.065(35)-0.613\\\\=1.667-0.613\\\\=1.667 \approx 1.7

Hence, person happiness with with family income of $35,000 on a scale of 3 is y = 1.7

That means they come under catergory "not to happy" and "fairly happy"

c) Find the happiness of person of family income os $45,000

we put x = 45 as in the equation above

y=0.065(45)-0.613\\\\=2.925-0.613\\\\=2.312 \approx 2.3

Hence, person happiness with with family income of $45,000 on a scale of 3 is y = 2.3

That means they come under catergory  "fairly happy"

8 0
3 years ago
Can somebody help me with this
EastWind [94]

Answer:

D = -1, -1, 2, 5

R = 0, 2, 3, 7

✅It is NOT A FUNCTION

Step-by-step explanation:

D (Domain) = input values (x-values)

D = -1, -1, 2, 5

R (Range) = output values

R = 0, 2, 3, 7

✅It is not a function because an x-value, -1, has two different y-values, 7 and 2, assigned to it.

7 0
3 years ago
So... What's the answer to this??
Sergio039 [100]

Answer:

12/5

Step-by-step explanation:

tan is o/a

so 24/10

simplify that

would be

12/5

7 0
3 years ago
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