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3 years ago

15

I don’t understand how to do number 38

1 answer:

rusak2 [61]3 years ago

6 0

The two red angle markers (the arcs) indicate that we have congruent angles. So this is an isosceles triangle making the two sides 24 and x^2+5x to be equal in length

Set the expressions equal to each other and solve for x
x^2+5x = 24
x^2+5x-24 = 0
(x-3)(x+8) = 0
x-3=0 or x+8=0
x = 3 or x = -8

So x is either 3 or -8
Plugging either x value into x^2+5x will have it turn into 24

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What kind of triangle is this?<br><br>A) Isosceles <br>B) Scalene <br>C) Equilateral

il63 [147K]

Answer:

Scalene

Step-by-step explanation:

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3 years ago

Keith is a drummer who purchases his drumsticks online. When practicing with the newest pair, he notices they feel heavier than

Marina86 [1]

Answer: 0.0174

Step-by-step explanation:

Given : $\mu=1.85\ \ ; \sigma=0.18$

Let x be the random variable that represents the weight of the drumsticks.

We assume that the weight of the drumsticks is normally distributed.

Now, the z-score for x=2.23 , $\because z=\dfrac{x-\mu}{\sigma}$

$\Rightarrow\ z=\dfrac{2.23-1.85}{0.18}\approx2.11\ \ \$

Using z-value table , we have

P-value =P(x≥2.23)=P(z≥2.11)=1-P(z<2.11)=1-0.9825708

=0.0174292≈0.0174 [Rounded nearest 4 decimal places]

Hence, the probability of the stick's weight being 2.23 oz or greater = 0.0174

6 0

4 years ago

Mike can jog 3 3/5 miles in 9/10 hour. Find his average speed in miles per hour.

zepelin [54]

Answer: 25

Step-by-step explanation:

Turn numbers into whole numbers 3 3/5= 3.60 & 9/10=90

so 90/3.60=25.

Hope this helps!

7 0

3 years ago

Read 2 more answers

Solve the following system pf equations

mr Goodwill [35]

Answer:

Step-by-step explanation:

If you need to do this by graphing, you need to change the format of each equation into slope intersect form

start with 3x-2y=-24

-2y=-3x-24

y=-3/2x+12

To graph this, the y intersect (where it crosses the y axis) is 12 and from there the slope is -3/2

For the next equation,

-3x-y=6

-y=3x+6

y=-3x-6

So the y intersect is -6 and the slope is -3.

Once you graph both of these, the point where both lines cross AKA the intersecion is the solution to the problem.

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3 years ago

What is the equation of the line that passes through (3,-1) and (4,7)

ad-work [718]

Gradient = 7-(-1)/4-3
= 8
when x = 3, y = -1,
y = 8x + c
-1 = 8(3) + c
c = -1 - 24
= -25
the equation of the line is y = 8x - 25.

8 0

3 years ago

Read 2 more answers