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GuDViN [60]
3 years ago
9

What is the answer for 9=81×

Mathematics
2 answers:
Andrews [41]3 years ago
6 0
Itz dedpool!

do 81<span>÷9 then you get the answer which is well 9
so 9 is your answer
 it would help if i got brainliest but if the other guy wants it he can have it.

hope this helped! 

if  got it wrong just tell me in comments and ill edit my answer
</span>
galina1969 [7]3 years ago
3 0
The awnsser is 9..................

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WILL GIVE BRAINLIEST!
OLga [1]

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

= \frac{(16*10466)-(120*1379)}{(16*919.5)-(120)^{2}}

= \frac{167456-165480}{14712-14400}

= \frac{1976}{312}

= 6.33

and b = Σy − m(Σx)/ N

= \frac{1379-(6.33*120)}{16}

= \frac{1379-759.6}{16}

= \frac{619.4}{16}

= 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%

7 0
3 years ago
The equation yˆ=24.387x + 328.182 models Math SAT scores, y, where x is the number of hours spent studying.
Feliz [49]

Answer:

Without any studying, the score would be about 328

Step-by-step explanation:

The y-intercept of an equation represents the point where its graph crosses the y-axis. At this point the value of x is always equal to 0.

The y-intercept of the equation in this context would represent the Math SAT score of a student who did not do any studying, that is the number of hours spent studying, x = 0.

Substitute x = 0 in the given equation and solve for y;

y = 24.387(0) + 328.182

y = 328.182

Therefore, Without any studying, the score would be about 328

6 0
3 years ago
Runelle collected river water for an experiment. She poured it into 8 jars. Each jar had the mixed number two and three fourths
Korolek [52]

Answer: 22 pints of water

Step-by-step explanation:

Runelle collected river water and poured in eight jars such that each jar had 2³/₄ of water.

The total amount of water collected by Runelle from the river will therefore be the sum of all the water in the 8 jars and because they are the same, we can simply multiply the quantity in one jar by 8 to see the sum:

= Amount of water in one jar * 8 jars

= 2³/₄  * 8

= 11/4 * 8

= 22 pints of water

7 0
3 years ago
Predict how many times you will roll a number less than 3 if you roll a standard number
Korvikt [17]

Answer:

about 117 times

Step-by-step explanation:

No. of possible outcomes of a cube: 6

2 out the 6 possible outcomes are less than 3,

and therefore, No. of favorable outcome: 2

P(less than 3)= No. of favorable outcome / No. of possible outcomes

                     =2/6 => 1/3

if you roll a standard number  cube 350 times then,

Prediction= number of rolls x (P(less than 3))

                =350 x 1/3

                ≈117 times.

4 0
3 years ago
Chandresh has several fishing rods that she would like to pack in boxes. One box is shown below.
tresset_1 [31]

Answer:

the 24-inch rod

Step-by-step explanation:

5 0
3 years ago
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