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vodka [1.7K]
3 years ago
6

ANSWER QUICKLY PLEASE AND THANKYOU!

Mathematics
1 answer:
dusya [7]3 years ago
3 0
1. Since we have a slope, and only one point we can use point slope form. Point slope form is y - y1 = m(x-x1). We will replace the y1 and x1 with our coordinates. Additionally, we will replace m with -2. y - 4 = -2(x-3). If you wish to solve this, we need to first distribute. y - 4 = -2x+ 6. Then, we can add 4 which will give us 10. y = -2x + 10.
2. We just need to find the slope here. To find the slope, you can use the formula y2 - y1 / x2 - x1. 3 - (-1) / 9 - 1 gives us 4/8 or 1/2. Plot the points you’re given, and then use the slope to plot more points so you can create your line.
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A woman is 10 times as old as her daughter. In 8 years she will be 4 times as old as her daughter. How old is the mother now?
jeka57 [31]

Answer:

Mom is 40 and her daughter is 4; in eight years, mom will be 48 and her daughter will be 12.

Step-by-step explanation:

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PLEASE ANSWER ASAP WILL MARK BRAINLIEST!!!!!!!solve for x write both solutions. 2x^2+9x+9=0
slavikrds [6]
2x^2+9x+9=0\\\\2x^2+6x+3x+9=0\\\\2x(x+3)+3(x+3)=0\\\\(x+3)(2x+3)=0\iff x+3=0\ \vee\ 2x+3=0\\\\x+3=0\ \ \ |-3\\x=-3\\\\2x+3=0\ \ \ |-3\\2x=-3\ \ \ |:2\\x=-1.5


Answer:\ \boxed{x=-3\ \vee\ x=-1.5}
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Representing algebraic relationships in tables and graph. Graph each equation y=x+3
KatRina [158]

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Step-by-step explanation:

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3 years ago
How do I solve this?: The times of all 15 year olds who run a certain race are approximately normally distributed with a given m
Effectus [21]
We need to 'standardise' the value of X = 14.4 by first calculating the z-score then look up on the z-table for the p-value (which is the probability)

The formula for z-score:
z = (X-μ) ÷ σ

Where
X = 14.4
μ = the average mean = 18
σ = the standard deviation = 1.2

Substitute these value into the formula

z-score = (14.4 - 18) ÷ 1..2 = -3

We are looking to find P(Z < -3)
The table attached conveniently gives us the value of P(Z < -3)  but if you only have the table that read p-value to the left of positive z, then the trick is to do:
1 - P(Z<3)

From the table
P(Z < -3) = 0.0013

The probability of the runners have times less than 14.4 secs is 0.0013 = 0.13%


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3 years ago
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