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3 years ago

14

A math tutor charges $30 per session each month plus a $5 scheduling fee. If jane pays a total of $215 in May for tutoring devic

es, how many sessions did she pay for?

1 answer:

wel3 years ago

6 0

Answer:

it should be 6 not 100% sure though

Step-by-step explanation:

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Questione Simplify Cosa + 2Cos(a +240")

melamori03 [73]

Step-by-step explanation:

$\cos(a) + 2 \cos(a + 240)$

$\cos(a) + 2 \cos(a) \cos(240) - \sin(a) \sin(240)$

$\cos(a) + 2( - \frac{ \cos(a) }{2} + \frac{ \sqrt{3} }{2} \sin(a) )$

$\cos(a) - \cos(a) + \sqrt{3} \sin(a)$

$\sqrt{3} \sin(a)$

If you graph the new identity, and the og identiy, they will be conciding graphs, so they are the same identity.

7 0

2 years ago

If the measure of the angle m is twice the measure of its complement if the given angle is 40 degrees, What is the measure of an

sladkih [1.3K]

C. Because complementary angles are two angles whose sum equals 90 degrees so do 90-40=50 then 50x2= 100

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2 years ago

Find the complex zeros of <br><img src="https://tex.z-dn.net/?f=%20f%28x%29%20%3D%20%7Bx%7D%5E%7B3%20%7D%20%20-%2013%20%7Bx%7D%5

timama [110]

$f(x) = 0 \\\\\implies x^3-13x^2+59x -87 =0\\\\\implies x^3 -3x^2 -10x^2 +30x +29x - 87=0\\\\\implies x^2(x-3) - 10x(x-3) + 29(x-3) =0\\\\\implies (x-3)(x^2 -10x +29) =0\\\\\implies x - 3 = 0 ~~ \text{or}~~x^2 -10x +29 = 0\\\\\implies x =3~~ \text{ or} ~~ x = \dfrac{-(-10) \pm \sqrt{(-10)^2 -4 \cdot 1 \cdot 29}}{2(1)}\\\\\implies x =3~~ \text{ or} ~~ x = \dfrac{10\pm \sqrt{-16}}{2}\\\\\implies x =3~~ \text{ or} ~~ x = \dfrac{10\pm 4i }{2}\\$

$\\\implies x =3~~ \text{ or} ~~ x =5 \pm 2i\\\\\text{Hence the complex roots are,}~ 5- 2i ~~ \text{and} ~~5 + 2i$

6 0

2 years ago

Is 9 greater then -8?

Alex Ar [27]

Answer:

Yes. Bc 8 have a negative sign infront of it so 9 greater

4 0

2 years ago

Read 2 more answers

What is the solution to бn + 1 = 2n – 7

yawa3891 [41]

Answer:

n = -2

Step-by-step explanation:

6n = 2n-8

4n = -8

n = -2

8 0

3 years ago

Read 2 more answers