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Anit [1.1K]
3 years ago
12

Solve for the value of k. how? how can I solve it​

Mathematics
1 answer:
Ahat [919]3 years ago
4 0

Answer:

6

Step-by-step explanation:

The total of all the angles must be 180, since there is a straight line. We already know the 40 degree angle and the 90 degree angle, meaning that the remaining angle must be equal to 180 - 90 - 40, which is 50 degrees. Therefore, 50 = 7k + 8. 7k = 50-8 = 42, and k = 6.

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A gift shop sells 140 wind chimes per month at $90 each. The owners estimate that for each $5 increase in price, they will sell
guapka [62]

Answer: $95

Step-by-step explanation:

Te new price will be 90 + 5x, if the price increases "x" times

The number of wind chimes sold per month will become 140 - 7x

\begin{aligned}&\text {Revenue, } \mathrm{R}(\mathrm{x})=(90+5 \mathrm{x})(140-7 \mathrm{x}) \\&R^{\prime}(x)=5(140-7 x)-7(90+5 x) \\&R^{\prime}(x)=700-35 x-630-35 x \\&R^{\prime}(x)=70-70 x=0 \\&70 x=70 \\&x=1\end{aligned}

Therefore, if the price becomes (90 + 5(1)) = $95 per wind chime, then the revenue will be maximum

6 0
3 years ago
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kkurt [141]
2:1 means its by a factor of 1/2. Meaning you just use the original number and divide by 2. The answer is B
4 0
3 years ago
What is the length of PR?
JulsSmile [24]

Answer:

x = 6

Step-by-step explanation:

Since the triangles are similar, we can use ratios to solve

20            24

--------- = ---------

5                x

Using cross products

20x = 24*5

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20x/20 = 120/2

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3 0
3 years ago
Read 2 more answers
What is an identity element of addition​
timama [110]

Answer:

0

Step-by-step explanation:

0 is the identity element under addition for the real numbers.

3 0
3 years ago
What percent of 25 is12<br><br> And how do I work it
Sergio [31]
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Amount/Whole Amount * 100

5 0
3 years ago
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