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Oduvanchick [21]

3 years ago

9

Find the equation of the straight line which passes through the two points (1,5) and (-2,4).Suppose the equation is y=ax+b.Find

a,b.

1 answer:

Fofino [41]3 years ago

3 0

Answer:

a=3 , b=2

Step-by-step explanation:

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Six friends share 4apple equally. How much Apple does each friend gets?

aleksandr82 [10.1K]

<span>To find out the answer to this question, you just need to divide the amount of apples that they currently had with the total members of their group of friends In this case, we got 6 apples / 4 friends = 1 2/4 apples for each = 1.5 apples for each friend</span>

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4 years ago

$11,000, invested for 9 years at 3% compounded quarterly

12345 [234]

See attachment for your Answer.

8 0

4 years ago

Leah claims that these figures are not similar. When she compared the heights, she wrote 2/7. Then she compared the bases and 21

antiseptic1488 [7]

Answer:

The two figures are similar and hey are not solid.

Step-by-step explanation:

I think your question is missed of key information, allow me to add in and hope it will fit the original one.

<em>Leah claims that these figures are not similar. When she compared the heights, she wrote 2/7. Then she compared the bases and 21/6. Why is Leah having trouble? Explain completely</em>

(Please have a look at the attached photo)

My answer:

In the first ratio, she compared the small figure's height to the large figure's height that is: 2/7

In the second ratio, she compared the large figure's base to the small figure's base that is: 21/6

=> She is wrong in this step, the ratio must be 6/21

Hence she needs to compare bases and heights thorugh division because the ratio between heights and the ratio between bases must be equal

$\frac{21}{6}=3.5\\\frac{7}{2}=3.5$

The scales are equal

=> Therefore, those rectangles are congruent.

8 0

3 years ago

Please! Due soon

Ivenika [448]

Answer:So, the least squares regression equation is : y= mx+b ⇒ y= 6.33x +38.71

b. When x= 8, then y= (6.33×8)+38.71 = 50.64 + 38.71 =89.35

The approximate test score of a student who sleeps an average of 8 h a night is 89.35%

Step-by-step explanation:

hey someone else has already answered this!

a. To find the least squares regression equation for a group of (x,y) points:

Step 1: For each point(x,y), we need to calculate x² and xy first.

Step 2: Sum all x, y, x² and xy, which gives us Σx, Σy, Σx² and Σxy

Step 3: Calculate Slope m: m = (NΣxy − Σx Σy)/ N(Σx²) − (Σx)² , here N is the number of data.

Step 4: Calculate Intercept b: b = Σy − m(Σx)/ N

Step 5: Assemble the equation as y= mx+b

Here, we have ∑x = 120, ∑y= 1379, ∑x²= 919.5, ∑xy= 10466 and N= 16

So, m= (NΣxy − Σx Σy)/ N(Σx²) − (Σx)²

=

=

=

= 6.33

and b = Σy − m(Σx)/ N

=

=

=

= 38.71

So, the least squares regression equation is : y= mx+b ⇒ y= 6.33x +38.71

b. When x= 8, then y= (6.33×8)+38.71 = 50.64 + 38.71 =89.35

The approximate test score of a student who sleeps an average of 8 h a night is 89.35%

EVERYTHING IS FROM sicista on brainly!

4 0

3 years ago

Can somebody please help?

fgiga [73]

Answer:

1. real number, irrational number

2. rational number, real number

7 0

3 years ago