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vekshin1
2 years ago
12

I am trying to join Brainly for my daughter, she is in the 5th grade and has a hard time. For some reason i am not able to make

a account. Can you please help me with this?
Mathematics
1 answer:
stiv31 [10]2 years ago
5 0

Answer:

The only way to make a question is if you have an account unless you want to make another account i think you have to log out and make a new account or go into a different device and make a new account for her.  

Step-by-step explanation:

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How do I make a the subject of this formula <br><br>w=3(2a+b)-4​
ololo11 [35]

Answer:

math

Step-by-step explanation:

w=3(2a+b)-4

=6a+3b-4

5 0
3 years ago
Problem page the longer leg of a right triangle is 1ft longer than the shorter leg. the hypotenuse is 9ft longer than the shorte
LenKa [72]
Hello,

To solve this problem we want to use the Pythagorean Theorem. 
The pythagorean theorem states that for a 90° triangle, 

a^{2} +  b^{2}  =  c^{2}

where a and b represent the two legs of the triangle, and c represents the hypotenuse. 

Let a = the longer leg and b = the shorter leg.
If the longer leg of the triangle is 1 foot longer than the shorter leg, then
a = b +1. 

If the hypotenuse is 9 feet longer than the shorter leg, then c = b + 9.
Using the equations we created, we can plug them into the Pythagorean Theorem to solve for a, b, and c. 

Doing this, we have:
a^{2} +  b^{2} =  c^{2}
(b+1)^{2}  + b =  (b+9)^{2}

Expanding this, we get b^{2} + 2b + 1 +  b^{2}  =  b^{2} + 18b + 81&#10;&#10; 2b^{2} + 2b + 1 =  b^{2} + 18b + 81&#10;&#10; b^{2}  + 1 = 16b + 81&#10;&#10; b^{2} = 16b + 80&#10; &#10;b^{2} - 16b - 80 = 0&#10;&#10;

Solving for b, we get b = 20, and b = -4.
The length of the side of a triangle cannot be negative, so we know that b = 20. 

However, we should check this with the original question to make sure it checks out.

a = b + 1
a = 20 + 1 = 21

c = b + 9
c = 20 + 9 = 29

So, we have a = 21, b = 20, and c = 29. (Also, 20-21-29 is a well known Pythagorean triple)
Using the Pythagorean Theorem, we have:

21^{2} +  20^{2} =  29^{2}
441 + 400 = 841
841 = 841, checks out.

So, the shorter leg is 20 feet, the longer leg is 21 feet, and the hypotenuse is 29 feet. 

Hope this helps!

7 0
3 years ago
What is the quotient of 3/4 divided by 1/5
Charra [1.4K]

Answer:

15/4

Step-by-step explanation:

3/4:1/5= 3/4*5= 15/4

3 0
3 years ago
6. A bookstore recorded a decrease in the sales of paperback books over the past year. From last year to this year the store exp
tensa zangetsu [6.8K]

Answer:

6966

Step-by-step explanation:

7740*10%=774

7740-774=6966

5 0
2 years ago
Is it true that decimals that are converted to fractions should never be reduced
natta225 [31]

Answer:

No

Step-by-step explanation:

See take 0.2 for example

In fraction it is 2/100 which can be easily reduced and should be reduced depending on the type of question.

1/50 would be the answer for my example.

3 0
3 years ago
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