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bekas [8.4K]
2 years ago
14

Select the expression that has a value of 15.

Mathematics
1 answer:
lorasvet [3.4K]2 years ago
4 0

Answer:

Second option

Step-by-step explanation:

We will use the process of elimination to find the answer:

<u>First option:</u>
4+(8\times4)\div6+7
8\times4=32
4+32\div6+7
4+32=36
36\div6+7
36\div6=6
6+7=13
=13

<u>Second option:</u>
(4+8)\times4\div6+7
4+8=12
12\times4\div6+7
12\times4=48
48\div6+7
48\div6=8
8+7=15
=15

Which means your answer is the second option or "4 + (8 × 4) ÷ 6 + 7."

Hope this helps.

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Find tan(450-a), If <br><img src="https://tex.z-dn.net/?f=%20%5Ctan%28a%29%20%3D%20%20%5Cfrac%7B1%7D%7B2%7D%20" id="TexFormula1"
Inessa05 [86]

Answer:

tan(450-a)=5\sqrt{3}-8

Step-by-step explanation:

We know that:

tan(a-b)=\frac{tan(a)-tan(b)}{1+tan(a)tan(b)}

tan(450-a)=\frac{tan(450)-tan(a)}{1+tan(450)tan(a)}

Remember:

450°=360°+60°

and:

tan(a)=\frac{1}{2}

Thus:

tan(450-a)=\frac{tan(60)-tan(a)}{1+tan(60)tan(a)}\\\\

Then:

tan(450-a)=5\sqrt{3}-8

4 0
3 years ago
Please really need the correct answer for this or I'll fail algebra 3
trapecia [35]

Answer:

4\pi

Step-by-step explanation:

S = Arc Lenth

θ = Radians

R = Radius

S = θR

So, now that we understand the formula, we will convert 72° into radians by introducing the equation x*\frac{\pi }{180}, x = 72

S =  72*\frac{\pi }{180} * R

given that R = 10

S = \frac{72*10*\pi }{180}

S = \frac{720*\pi }{180}

We simplify 720 as 180 goes into 720 4 times and we get

S = 4\pi

Hope this helps

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2 years ago
Help plss!!show me how to do this and the answer for 20 or 15 points thx!
GarryVolchara [31]
Let me show you a website that has saved my behind so many times in high-school...

https://www.cymath.com/

4 0
4 years ago
Solve the equation the square root of the quantity x plus 4 minus 3 equals 1 for the variable.
Kruka [31]

Answer:

x = 12

Step-by-step explanation:

sqrt(x+4) - 3 = 1

First get the sqrt all by itself on one side of the equation. Add 3 to both sides of the equation.

sqrt(x+4) = 1 + 3

sqrt(x+4) = 4

To "fix" the sqrt, that is, "undo it" and get rid of it, you have to SQUARE both sides of the equation.

(sqrt(x+4))^2 = 4^2

x + 4 = 16

subtract 4 to finish up.

x = 12

Check:

sqrt(12 + 4) - 3 = 1

sqrt16 - 3 = 1

4 - 3 = 1

1 = 1 Check!

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2 years ago
Một công ty kinh doanh 1 loại sản phẩm có
allochka39001 [22]

Answer:

ask in English then I can help u

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