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Roman55 [17]
3 years ago
11

Find the x, if the three angles of an equilateral triangle are 45°, 2x+7°, 45°​

Mathematics
1 answer:
marusya05 [52]3 years ago
7 0

Answer:

19

Step-by-step explanation:

2x+7=45

2x=38

X=19

I hope this helps

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evan is thinking about buying some board games. He finds the games he wants on a web site . Each game cost $15 and shipping is $
kari74 [83]

Answer:

5 games

Step-by-step explanation:

15x + 10 = 85

      - 10 = - 10

15x        =  75

/15          =  /15

x      =       5

4 0
3 years ago
To keep cylindrical flower vases from spilling, a designer is planning to enlarge the original area of the base by 25%. The new
spin [16.1K]

Answer:

To keep the same volume, the designer needs to decrease the height of the vase by 20%


Step-by-step explanation:

Volume of cylinder formula is  V=\pi r^2 h


Area of base is  \pi r^2, if this area is increased by 25%, the new area of base would be:

\pi r^2 + \frac{25}{100}(\pi r^2)\\=\pi r^2 + (0.25)(\pi r^2)\\=1.25\pi r^2


Since volume would be same, we can make the height as:

V=\pi r^2 h\\V=(1.25\pi r^2)(\frac{h}{1.25})\\V=\pi r^2h


Thus, we can see that the height needs to be divided by 1.25, which we can write in fractional form as:

\frac{h}{1.25}\\=\frac{h}{\frac{5}{4}}\\=h*\frac{4}{5}\\=h*(0.8)


Thus, height needs to be \frac{4}{5} of original (or 80% of original)


4 0
3 years ago
GUYS ILL GIVE 20 points just plsss help quick I got 5 hours till this assignment in turn in plsssss
mario62 [17]
D for sure love :)) !! Good luck
3 0
3 years ago
Please answer the question that is in the picture
serg [7]
Work shown above! Answer is 135°

5 0
3 years ago
Calculate the average rate of change of f(x) = 3x^2 + 2x + 1 for 2 ≤ x ≤ 4
AURORKA [14]
\bf slope = {{ m}}= \cfrac{rise}{run} \implies 
\cfrac{{{ f(x_2)}}-{{ f(x_1)}}}{{{ x_2}}-{{ x_1}}}\impliedby 
\begin{array}{llll}
average\ rate\\
of\ change
\end{array}\\\\
-------------------------------\\\\
f(x)= 3x^2+2x+1  \qquad 
\begin{cases}
x_1=2\\
x_2=4
\end{cases}\implies \cfrac{f(4)-f(2)}{4-2}
\\\\\\
\cfrac{[3(4)^2+2(4)+1]~~-~~[3(2)^2+2(2)+1]}{2}
\\\\\\
\cfrac{[48+8+1]~~-~~[12+4+1]}{2}\implies \cfrac{57-17}{2}
\\\\\\
\cfrac{60}{2}\implies \cfrac{30}{1}\implies 30
8 0
3 years ago
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