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Sever21 [200]
3 years ago
11

How do you solve (3*x) *7

Mathematics
1 answer:
shtirl [24]3 years ago
6 0
3\cdot x\cdot7=21x
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PLS HELP ME ASAP I WILL MARK BRAINLIEST!!!
ANTONII [103]

Answer: root 86 and root 14

Step-by-step explanation:dont delete my answer btw

7 0
3 years ago
Verify the identity below with work and/ or explanation. 2gh/sin^2θ = 2gh sec^2θ/sec^2θ-1 Thanks!
Orlov [11]

Answer:

identify is verified, see work below.

Step-by-step explanation:

Verify following identity

2gh/sin^2θ = 2gh sec^2θ/sec^2θ-1

use identity 1+tan^2(θ) = sec^2(θ) on denominator of right-hand-side

right-hand side

= 2gh sec^2(θ) / (sec^2(θ)-1)

=  2gh sec^2(θ) / (tan^2(θ))

=  2gh sec^2(θ) * (cos^2(θ) / sin^2(θ) )   [note: sec^2(θ) = 1/cos^2(θ)]

= 2gh * 1 / sin^2(θ)

= 2gh / sin^2(θ)

= left-hand side

Therefore identify is verified.

3 0
4 years ago
The Calef family likes to paddle along the Susquehanna River.
storchak [24]

<u><em>Answers:</em></u>

a. \frac{14}{3}=4.667 miles/day

b. 14 miles

<u><em>Explanation:</em></u>

<u>Part a:</u>

We are given that they paddled a total distance of 14 miles for 3 days. To get the distance paddled each day, we will divide the total paddled distance by the number of days

<u>This is done as follows:</u>

Distance paddled each day = \frac{14}{3}=4.667 miles/day

<u>Part b:</u>

<u>Now, we are given that:</u>

<u>i. They went half their daily distance:</u>

Daily distance = \frac{1}{2}*\frac{14}{3}=\frac{7}{3} miles/day

<u>ii. They extended the trip twice as many days</u>

Number of days = 2 × 3 = 6 days

The total distance paddled will be equivalent to the product of the distance paddled each day and the total number of days

<u>This means that:</u>

Total distance = \frac{7}{3}*6=14 miles

Hope this helps :)

6 0
3 years ago
Solve for x.<br><br> 3x^2−10=−5<br><br> (choices in photo)
stiks02 [169]
The correct answer is the second one: ±√15/3

 Explan ation:

 You have the quadratic equation <span>3x^2−10=−5. Then you must clear the variable "x" as below:
</span><span>
 3x^2−10=−5</span> 
<span> 3x^2=−5+10
 </span><span>3x^2=5
 </span><span>x^2=5/3
 x=</span>±√(5/3)

 When you multipy the numerator and the denominator by 3 for simplify the result, you obtain:

 x=±√(5x3/3x3)
 x=±√(15/3²)

 When you simplify, you have:

 x=±√15/3

 
3 0
3 years ago
What is 5+4 help please
Keith_Richards [23]
The answer is 9.  I notice you keep asking the same questions over and over again, all simple and trivial answers.  Please either stop trolling or consult a parent or teacher to help you!
7 0
3 years ago
Read 2 more answers
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