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Svetradugi [14.3K]
3 years ago
11

The formula x = -

Mathematics
1 answer:
diamong [38]3 years ago
7 0

Answer:

quadratic formula

Step-by-step explanation:

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Twelve years ago, Mandy's father was 5 times as old as she. Mandy's father was 28 years older than she. How old is Mandy now?
Sphinxa [80]
Mandy father was 28
Mandy father = 5M=28
M=28/5
Now Mandy will be 28/5+12= 17.6 years
5 0
2 years ago
Which fraction shows a correct way to set up the slope formula for the line that passes through the points (4, -6) and (-2, 1)?
alexandr402 [8]
Y +6 = -7/6 (x-4)



Mark brainliest please


Hope this helps you
6 0
2 years ago
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There are 3 cans that store 9 tennis balls. Consider the number of balls per can a.find the constant of proportionality for this
sergeinik [125]

Answer:

Write an equation that will model the proportional relationship given in each real world situation.

1. There are 3 cans that store 9 tennis balls. Consider the number of balls per can.

a. Find the constant of proportionality for this situation.

9 balls (B)

_________ = 3

3 cans (C)

b. Write an equation to represent the relationship.

b = 3c

5 0
2 years ago
Factorise :x^2-4x-21+10y-y^2​
Elenna [48]

Answer:

This cannot factor

Step-by-step explanation:

This cannot factor because there is no number that can be factored out of all of the terms.

4 0
3 years ago
\\\\\\\-------!!!!!40 POINTS!!!!-----\\\\\\\\\
aleksandrvk [35]
Let's actually find the line of best fit...

m=(nΣyx-ΣyΣx)/(nΣx^2-ΣxΣx)

m=(11*836-130*55)/(11*385-3025)

m=2046/1210  

m=93/55

b=(Σy-93Σx/55)/n

b=(55Σy-93Σx)/(55n)

b=(7150-5115)/(55*11)

b=185/55, so the line of best fit is:

y=(93x+185)/55

A)  The approximate y-intercept (the value of y when x=0) is 185/55≈3.36.

Which means that those who do not practice at all will win about 3.36 times

B) y(13)=(93x+185)/55

y(13)≈25.34

So after 13 months of practice one would expect to win about 25.34 times.
3 0
3 years ago
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