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bazaltina [42]
3 years ago
12

4 copies of 3 tenths in

Mathematics
2 answers:
Katen [24]3 years ago
5 0

Answer:

what

Step-by-step explanation:

do you want to ask? bro I don't know about your questions

Arada [10]3 years ago
4 0

Answer:

T: 4 copies of 3 tenths is 12 tenths.

don't forget to make me brainlist

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Sam bought lunch everyday for 5 days with his debit card. each day he spent $8. if these were his only transactions for this wee
cupoosta [38]

Answer:

-40$

Step-by-step explanation:

Just do 5 x 8, and then since the money is being taken out, put a negative sign

5 0
2 years ago
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The lines (m-2)x+y=2 and mx+2y=k intersect at (2,8). Find the values of m and k
Lerok [7]

Step-by-step explanation:

(m - 2)x + y = 2

y = -(m - 2)x + 2

8 = -(m - 2)(2) + 2

6 = -(m - 2)(2)

3 = -(m - 2)

-3 = m - 2

-1 = m

mx + 2y = k

2y = -mx + k

y =  -  \frac{1}{2} mx +  \frac{k}{2}  \\ y =  \frac{1}{2} x +  \frac{k}{2}  \\ 8 =  \frac{1}{2} (2) +  \frac{k}{2}  \\ 7 =  \frac{k}{2}  \\ 14 = k

4 0
3 years ago
What does 25% of 80 equal
Anna007 [38]

Answer:

20

Step-by-step explanation:

25*4 equals 100  so 80/4 is 20.

4 0
3 years ago
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Find the area of the kite. ​please help
nasty-shy [4]

Answer:

it is 772

Step-by-step explanation:

38x19=772 AREA-means Multiply

3 0
3 years ago
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Use linear regression to find the equation for the linear function that best fits this data. Round both numbers to two decimal p
natta225 [31]

Answer:

The equation of the linear function that best fits the data is,

<em>y</em> = 18.66<em>x</em> + 66.87.

Step-by-step explanation:

The line of best is of the form: <em>y</em> = <em>mx</em> + <em>b</em>.

Here, <em>m</em> = slope of the line and <em>b</em> = intercept.

The formula to compute the intercept and slope are:

b=\frac{\sum Y.\sum X^{2}-\sum X.\sum XY}{n.\sum X^{2}-(\sum X)^{2}}

m=\frac{n.\sum XY-\sum X.\sum Y}{n.\sum X^{2}-(\sum X)^{2}}

Consider the table below for the values of <em>∑ X, ∑ Y, ∑ X² </em>and <em>∑ XY</em>.

Compute the value of  intercept and slope as follows:

b=\frac{\sum Y.\sum X^{2}-\sum X.\sum XY}{n.\sum X^{2}-(\sum X)^{2}}=\frac{(793\times91)-(21\times3102)}{(6\times91)-(21)^{2}} =66.867

m=\frac{n.\sum XY-\sum X.\sum Y}{n.\sum X^{2}-(\sum X)^{2}}=\frac{(6\times3102)-(21\times793)}{(6\times91)- (21)^{2}} =18.657

The line of best fit is:

y=mx+b\\y=18.657x+66.867\\y=18.66x+66.87

Thus, the equation of the linear function that best fits the data is <em>y</em> = 18.66<em>x</em> + 66.87.

3 0
3 years ago
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