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lesya692 [45]
1 year ago
10

Please help me with this

Mathematics
2 answers:
emmainna [20.7K]1 year ago
8 0

Answer:

x = 12

Step-by-step explanation:

AB + BC  = AC

(x-5)   + 11   = 2x-6

x -5 + 11 = 2x-6     add 6 to both sides

x + 12 = 2x             subtract x from both sides

12 = x

Arte-miy333 [17]1 year ago
7 0

Answer:

6

Step-by-step explanation:

im not entirely sure but i did try hope it's  right lmk

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Work out the percentage change when a price of £10 is increased to £12.
Anastaziya [24]

Answer:

20%

Step-by-step explanation:

Use the percent change formula: difference = % * original cost

12 - 10 = 2

The difference is 2 and the original cost is 10. Now, we have the equation

2 = % * 10. We don’t know the percentage right? So now we have to find the percentage. To do this, you will have to do 2 divided by 10, which is 0.20. Lastly, we have to turn 0.20 into a percentage by multiplying it by 100, leaving you with 20%. So therefore, 20% is the percent increase. Hope this helps!

3 0
2 years ago
If 1200 cm^2 of material is available to make a box with a square base and an open top find the largest possible volume of the b
strojnjashka [21]
Surface area of box=1200 cm² 
<span>Volume of box=s²h </span>
<span>s = side of square base </span>
<span>h = height of box </span>
<span>S.A. = s² + 4sh </span>
<span>S.A. = surface area or 1200 cm², s²
 = the square base, and 4sh = the four 'walls' of the box. </span>
<span>1200 = s² + 4sh </span>
<span>1200 - s² = 4sh </span>
<span>(1200 - s²)/(4s) = h </span>


<span>v(s) = s²((1200 - s²)/(4s)) </span>
<span>v(s) = s(1200 - s²)/4 . </span>
<span>v(s) = 300s - (1/4)s^3</span>

by derivating
<span>v'(s) = 300 - (3/4)s² </span>
<span>0 = 300 - (3/4)s² </span>
<span>-300 = (-3/4)s² </span>
<span>400 = s² </span>
<span>s = -20 and 20. </span>
again derivating
<span>v"(s) = -(3/2)s </span>
<span>v"(-20) = -(3/2)(-20) </span>
<span>v"(-20) = 30 </span>
<span>v"(20) = -(3/2)(20) </span>
<span>v"(20) = -30 </span>


<span>v(s) = 300s - (1/4)s^3 </span>
<span>v(s) = 300(20) - (1/4)(20)^3 </span>
<span>v(s) = 6000 - (1/4)(8000) </span>
<span>v = 6000 - 2000 
v=4000</span>
4 0
3 years ago
What is the product to 20×1.59
mote1985 [20]

Answer:

The correct answer is 31.8

Step-by-step explanation:

HAVE A GOOD DAY!

7 0
2 years ago
Tyler missed 20% of the problems on his math test. There were 30 problems on his math test. How many problems did he miss?​
natima [27]

Answer:

6 questions

Step-by-step explanation:

30 x 0.2 = 6

3 0
2 years ago
Read 2 more answers
2(n+2)=10 solve for n
astra-53 [7]

Answer :

<em>\:  \:  \:  \:  \:  \: 2(n + 2) = 10 \\  =  > 2n + 4 = 10 \\  =  > 2n = 10 - 4 \\  =  > 2n = 6 \\  =  > n =  \frac{6}{2}  \\   = > n = 3</em>

5 0
3 years ago
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