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enyata [817]
3 years ago
6

The width of a rectangle is 12 less than twice the length, and the area of the rectangle is 270m2.

Mathematics
1 answer:
NikAS [45]3 years ago
8 0

Answer:

5

Step-by-step explanation:


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What is the value of x, if twice x plus 3 cubed equals 40?
tatuchka [14]

I will give two solutions, one where everything is cubed and one where just the 3 is cubed, because I don't know what you meant.

Just the 3 is cubed solution(Which I think is correct because it has a nicer answer):

Answer:

13/2

Step-by-step explanation:

We have that 2x+3^3=40.

We can subtract 3^3=27 from both sides of the equation to get 2x=13.

We can then divide by 2 to get x=13/2.

So, \boxed{x=13/2} and we're done!

Everything is cubed solution:

Answer:

\sqrt[3]{5}-3/2

Step-by-step explanation:

We have that (2x+3)^3=40.

We can take the cube root of both sides to get 2x+3=\sqrt[3]{40}.

Note that 40=2^3*5, so \sqrt[3]{40}=\sqrt[3]{2^3*5}=2\sqrt[3]{5}.

So, we want to solve 2x+3=2\sqrt[3]{5}.

We can subtract 3 from both sides to get 2x=2\sqrt[3]{5}-3.

We can then divide both sides by 2 to get x=\sqrt[3]{5}-3/2.

So, \boxed{x=\sqrt[3]{5}-3/2} and we're done!

6 0
3 years ago
The mark-up for a 75 dollar golf club is 80 dollars. Find the percent of the mark-up.
Sonja [21]
So from  75 to 80 and 75 is 100%

80-75=5
5 is x% of 75 
x%=percent markup
5=x% times 75
% means parts out of 100 so
x%=x/100
5=x/100 times 75
5=75x/100
75x/100=75/100 times x
75/100=3/4
5=3/4x
multiply both sides by 4/3
20/3=x
6.6666%
the percent mark up is 6.6666%
4 0
4 years ago
Find the inverse of the matrix (4, 2) (1, 2) if it exists
Leya [2.2K]
It’s b
For sure
I think :/
3 0
3 years ago
If a = -7 and b = -16, what is the value of - a - b?<br> is it<br> -23<br> -9<br> 23<br> 9
stiv31 [10]
If you meant -a minus -b, then this equation will then be -7 minus -16
-7-(-16)
-7+16
=9
3 0
4 years ago
Read 2 more answers
Evaluate the expressions. ​
frutty [35]

Answer:

(-6/7)^0=1

-(2)^0=-1

Step-by-step explanation:

hope it helped

can I have a brainliest please i really need that

7 0
3 years ago
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