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4 years ago

Please help me please!!!!!

Mathematics

1 answer:

kvasek [131]4 years ago

6 0

Since PQ is tangent to the circle, angle PQO is 90°.

Since the sum of angles of any triangle must be 180° we can say:

180-90-12=x thus:

x=78°

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south high school has 85 students more than North High School. The total number for both schools is 1495. How many students are

Soloha48 [4]

790 students I subtracted 1495-85 then divided that by two then added the 85 to 705 to get 790

6 0

4 years ago

If f(x) =1/2x + 7 and g (x) = 6x -8 find (f•g)(5)

Lorico [155]

Answer:

(f•g)(5)= $\frac{309}{44}$

Step-by-step explanation:

f(x) =1/2x + 7

g (x) = 6x -8

f(g(5))

f(22)= $\frac{1}{2x}$ +7

= $\frac{1}{44}$ +7

= $\frac{309}{44}$

4 0

3 years ago

Three small circles C1, C2, and C3, each with radius 0.1 and centered at the origin are in the xy-, yz-, and xz-planes, respecti

den301095 [7]

Curl is defined as:

$\bigtriangledown \times F=\frac{ \int F.dr}{Area}$

Which can be rewritten as:

$\frac{ \int F.dr}{Area}=\frac{ \int_{C_1} Fdr}{Area}\widehat{k}+\frac{ \int_{C_2} Fdr}{Area}\widehat{i}+\frac{ \int_{C_3} Fdr}{Area}\widehat{j}$

This is because C1 lies on the xy plane and thus it's unit vector will be $\widehat{k}$ .

By similar arguments the rest will follow too.

Now, area of each circle will be: $\pi \times (0.1)^2=0.01 \pi$

Therefore, Curl, as per our definition will be:

$\frac{\int F.dr}{Area}=\frac{0.01\pi}{0.01\pi}\widehat{k}+\frac{0.4\pi}{0.01\pi}\widehat{i}+\frac{5 \pi}{0.01\pi}\widehat{j}$

Thus, Curl= $40\pi \widehat{i}+500\pi \widehat{j} +\widehat{k}$

Which is the required answer.

7 0

4 years ago

What is the value of x- This is for brainliest!

aleksandr82 [10.1K]

You would need to write a solvable equation, and you can do this because you know that angles in a triangle add up 180° so the missing angle must be (180 - 9x). This makes the equation:
5x + 9 + x + (180 - 9x) = 180
6x + 9 + 180 - 9x = 180
-3x + 189 = 180
- 189
-3x = -9
÷ -3
x = 3

So your answer is x = 3, I hope this helps!

8 0

4 years ago

Graph of g(x) = x2 − 5

Brut [27]

Answer: 6rx = x^2 -5

8 0

3 years ago