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2 years ago

Question 5 3+7(2-5)+4 -26

Mathematics

1 answer:

Scrat [10]2 years ago

8 0

The right answer is -14

please see the attached picture for full solution

Hope it helps

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Solving Quardratic Equation x^3 + 5x^2 -16x - 80 = 0

Cloud [144]

This is not a quadratic equation.
It is a cubic equation.
X1 = 4
X2 = -5
X3 = -4

4 0

3 years ago

A scatter plot was constructed and a line of best fit was drawn, 25x 80. What is the equation of this best line of fit?

Tcecarenko [31]

Answer:

y = 5x + 25

Explaination:

To get the equation of a line, first get the slope of the line.

Slope = (change in y)/(change in x)

= (60-30)/(7-1)

= 30/6

= 5

Now use one point in the line (4,45) and a general point (x,y).

Slope = (change in y)/(change in x)

5 = (y - 45)/(x - 4)

5(x - 4) = (y - 45)

5x - 20 = y - 45

y = 5x -20 + 45

7 0

3 years ago

HELLLPPPPPPPP PLEASEEE use the image

Harrizon [31]

Answer:

20 2/3 feet

Step-by-step explanation:

7 3/4 * 2 2/3 = 20 2/3

Convert into improper fraction..

= 31/4 * 8/3

...

Solve equation...

= 20 2/3

The area of the garden is 20 2/3.

5 0

2 years ago

Read 2 more answers

What is the percent of change from 4,000 to 600? work too plz

xenn [34]

$\frac { n }{ 100 } \cdot 4,000=600\\ \\ 4,000\cdot n=60,000\\ \\ Therefore:\\ \\ n=\frac { 60,000 }{ 4,000 }$

$\\ \\ =\frac { 60\cdot 1,000 }{ 4\cdot 1,000 } \\ \\ =\frac { 60 }{ 4 } \\ \\ =15$

As 15% of 4,000 is 600, the percentage change was -85%.

4 0

3 years ago

Solve 10e^2x - 5 =23^x for x.

yawa3891 [41]

$10e^{2x}-5=23e^x\qquad\text{subtract}\ 23e^x\ \text{from both sides}\\\\10e^{2x}-23e^x-5=0\\\\10(e^x)^2-23(e^x)-5=0\\\\\text{substitution:}\ e^x=t > 0\\\\10t^2-23t-5=0\\\\10t^2-25t+2t-5=0\\\\5t(2t-5)+1(2t-5)=0\\\\(2t-5)(5t+1)=0\iff2t-5=0\ \vee\ 5t+1=0\\\\2t=5\ \vee\ 5t=-1\\\\t=\dfrac{5}{2} > 0\ \vee\ t=-\dfrac{1}{5} < 0\\\\\text{therefore}\ e^x=\dfrac{5}{2}\to\ln e^x=\ln\left(\dfrac{5}{2}\right)\\\\\boxed{x=\ln\left(\dfrac{5}{2}\right)}$

5 0

3 years ago

Read 2 more answers