All categories

3 years ago

How do I solve for r

Mathematics

2 answers:

White raven [17]3 years ago

3 0

To solve for R you use PEMDAS

Ksju [112]3 years ago

3 0

4 (r-10)^2+2=38
expand 4 [(r-10)(r-10)]+2=38
solve r-10×r-10
4 (r^2-20r+100)+2=38
-2 both sides
4 (r^2-20r+100)=36
÷4 both sides
r^2-20r+100=9
-9 both sides
r^2-20r+91=0
(r-7)(r-13)=0
r=7,13

You might be interested in

Trig please help

enot [183]

Answer:

One

Step-by-step explanation:

9/sin(34) = 6/sinC

sinC = 0.372795269

C = 21.9, 158.1

Since 158.1 + 34 = 192.1 > 180

It will not form a triangle

So,

Only one triangle with angle 21.9° at C

5 0

3 years ago

Which of the following is the correct SI unit to use in measuring amount of material contained in a solid sphere?

Lera25 [3.4K]

Kilogram, Mole, Candela, Ampere, Meter, Second and Kelvin are the 6 basic measures, so I guess Kilogram

5 0

3 years ago

Read 2 more answers

Explain or show how you could find by using the value of 5⋅3. If needed, use this diagram to support your reasoning.

Anika [276]

Answer:

Step-by-step explanation:

HELLOO

8 0

3 years ago

A school wishes to accept 2000 students for their freshman class, and they expect 20,000 applications. In order to make their ad

vovangra [49]

Answer:

456

Step-by-step explanation:

Let X be the SATscore scored by the students

Given that X is normal (1000,200)

By converting into standard normal variate we can say that

$z=\frac{x-1000}{200}$ is N(0,1)

To find the top 10% we consider the 90th percentile for z score

Z 90th percentile = 1.28

$X= 200+1.28(200)\\= 200+256\\=456$

i.e. only students who scored 456 or above only should be considered.

3 0

3 years ago

PLEASE HELP!

Mariana [72]

-----------------------------------------------
Information Given:
-----------------------------------------------
ON = 7x - 9
LM = 6x + 4
MN = x - 7
OL = 2y - 7

-----------------------------------------------
Since it is a parallelogram:
-----------------------------------------------
ON = LM and
MN = OL

-----------------------------------------------
ON = LM:
-----------------------------------------------
7x - 9 = 6x + 4

-----------------------------------------------
Subtract 6x from both sides:
-----------------------------------------------
x - 9 = 4

-----------------------------------------------
Add 9 to both sides:
-----------------------------------------------
x = 13

-----------------------------------------------
MN = OL:
-----------------------------------------------
x - 7 = 2y - 7

-----------------------------------------------
Sub x = 13:
-----------------------------------------------
13 - 7 = 2y - 7

-----------------------------------------------
Simplify:
-----------------------------------------------
6 = 2y - 7

-----------------------------------------------
Add 7 on both sides:
-----------------------------------------------
13 = 2y

-----------------------------------------------
Divide by 2:
-----------------------------------------------
y = 13/2

-----------------------------------------------
Answer: x = 13, y = 13/2 (Answer D)
-----------------------------------------------

6 0

3 years ago