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gregori [183]
2 years ago
10

Piano lessons cost 30 dollars for 3/4 hour how much for an hour

Mathematics
1 answer:
Nadusha1986 [10]2 years ago
6 0

Answer:

40

Step-by-step explanation:

Divide 30 by 3 to find 1/4. You get 10.

Multiply 10 by 4 to find 4/4. You get 40.

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Given the following rectangle and circle, at what approximate value of x are the two areas equal? Show work and explain all step
suter [353]

Answer:

x ≈ 1.28

Step-by-step explanation:

I just took the exam:

Area of rectangle =(3x-1)(x+6), Area of circle = PI(x+1)^2. If you graph these and find where they intersect, you will get x ≈ 1.28.

I hope this helped! :)

7 0
3 years ago
Mathematical logic for this game to make the best
slega [8]

Answer:

Ok tell me which mathematic game

6 0
2 years ago
SOMEBODY PLZ!! ITS THE LAST DAY I DONT WANNA FAIL :*(
spayn [35]
Part A. Lest fin the zeros of our function first: 
f(x)=-x^2-7x+30
Step 1. Set the right side of the function equal to 0:
0=-x^2-7x+30
-x^2-7x+30=0
Step 2. Multiply both sides of the equation by -1
(-1)(-x^2-7x+30)=0(-1)
x^2+7x-30=0
Step 3. Factor the left side: 
(x+10)(x-3)=0
Step 4. Set each factor equal to 0 and solve for x:
x+10=0 and x-3=0
x=-10 and x=3
Since distances can't be negative, the zero of our function is x=3.
<span>We can conclude that the zero </span>x=3 represents that when the horizontal distance of the diver is 3 ft, he is is in the surface of the pool. In other words, his vertical distance is zero. 

Part B. To factor our quadratic equation 9x^2+3x-2=0, we are going to use the method for simple cases because a \neq 0:
Step 1. Find tow numbers whose product is ac and its sum is b:
We know form our quadratic that a=9, b=3, and c=-2, so ac=9(-2)=-18.
We want tow numbers that multiply together to make -18, and add up to 3.
Those number are 6 and -3. (6)(-3)=-18 and 6-3=3
Step 2. Rewrite the middle term 3x using those numbers:
9x^2+6x-3x-2=0
Step 3. Factor the expression:
(9x^2+6x)-(3x+2)=0
3x(3x+2)-(3x+2)=0
(3x+2)(3x-1)=0







8 0
3 years ago
Find the derivative of f(x) = negative 11 divided by x at x = 9.
zavuch27 [327]
Remember the power rule
\frac{dy}{dx} x^m=mx^{m-1}
and the constant multipule rule
\frac{dy}{dx} cf(x)=c  \frac{dy}{dx} f(x) wher c is  a constant

so

f(x)= \frac{-11}{x} can be rewritten as
f(x)=-11x^{-1}
take deritivitve ad apply constnat multipule and power rule
f'(x)=-11(-1x^{-2})
f'(x)=11(x^{-2})
f'(x)= \frac{11}{x^2}

at x=9

f'(9)= \frac{11}{9^2}
f'(9)= \frac{11}{81}
4 0
2 years ago
Michelle's regular hourly wage at the candy factory is
Ierofanga [76]

Answer:

Michele earns $98.60 extra over the holiday.

Step-by-step explanation:

$9.86•35=$345.10

$9.86•45=$443.70

(I got 45 by adding 10 to 35.)

443.70-345.10=$98.60

8 0
3 years ago
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