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nika2105 [10]
3 years ago
6

A line passes through the point (4,-2) and has a slope of 1/2 what is the value of a if the point (-4,a) is also on the line

Mathematics
1 answer:
Slav-nsk [51]3 years ago
3 0

Answer:  The value of a is -6.

Step-by-step explanation:

To do this we need to find the y-intercept first.

-2= 4(1/2) + b

-2=2+ b

-2  -2

b= -4  so now the y-intercept is -4  so we will now have the equation y= 1/2x -4

so now put -4 into the equation for x and solve for y.

y= 1/2(-4) -4

y = -6

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Hall and Mindy are playing a guessing game. Hall tells Mindy: ""The difference between 17 and the square root of my mystery numb
cestrela7 [59]

Answer:

The possible number that Hall could be thinking of is 144.

Step-by-step explanation:

Difference between 17 and the square root of my mystery number

This is represented by:

17 - \sqrt{x}

is 5

Then:

17 - \sqrt{x} = 5

What are two possible numbers that Hall could be thinking of?

We have to solve the equation, for x. So

17 - \sqrt{x} = 5

\sqrt{x} = 12

(\sqrt{x})^2 = (12)^2

x = 144

The possible number that Hall could be thinking of is 144.

5 0
3 years ago
My grade is a 77%, if i get a 0% on a paper worth 30% of my grade, what will my grade be now??
blsea [12.9K]
Grade=Paper+Other
Grade=(Grade_{paper}\times Value_{paper})+(Grade_{other}\times Value_{other})
Grade=(0 \times 30\%)+(77\% \times (1-30\%))
Grade=(0 \times 30\%)+(77\% \times 70\%)
Grade=0+53.9\%
Grade=53.9\%
6 0
3 years ago
Christine watched a video for 3/8 minutes and she watched another video for 1/8 minutes how long did she watch videos in l
pashok25 [27]

Answer:

4/8=1/2 minutes

Step-by-step explanation:

You just add 3/8+1/8 and you get 4/8 and you can simplify that down to 1/2 minutes (half of a minute or 30 seconds)

3 0
3 years ago
Each person in a group of college students was identified by graduating year and asked when he or she preferred taking classes:
swat32

Answer:

<em>0.615</em>

Step-by-step explanation:

The frequency table is attached below.

We have to calculate, the probability that the student preferred morning classes given he or she is a junior.

i.e P(\text{Morning }|\text{ Junior})

We know that,

P(A\ |\ B)=\dfrac{P(A\ \cap\ B)}{P(B)}

So,

P(\text{Morning }|\text{ Junior})=\dfrac{P(\text{Morning }\cap \text{ Junior})}{P(\text{Junior})}

Putting the values from the table,

\dfrac{P(\text{Morning }\cap \text{ Junior})}{P(\text{Junior})}=\dfrac{\frac{16}{143}}{\frac{26}{143}}=\dfrac{16}{26}=0.615

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3 years ago
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The shaded area is 299.59un^2.

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3 years ago
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