2 years ago

What is the exponential equation

Mathematics

1 answer:

Len [333]2 years ago

3 0

I am pretty sure it’s the second one

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Which expression is equivalent to sin^2(pi/2 - x)/ sin x?

Yuki888 [10]

$We\ know:\\\\\sin\left(\dfrac{\pi}{2}-x\right)=\cos x\\and\\\sin^2x+\cos^2x=1\to\sin^2x=1-\cos^2x\\---------------------------\\\\\dfrac{\sin^2\left(\dfrac{\pi}{2}-x\right)}{\sin x}=\dfrac{\cos^2x}{\sin x}=\dfrac{1-\sin^2x}{\sin x}=\dfrac{1}{\sin x}-\dfrac{\sin^2x}{\sin x}\\\\=\dfrac{1}{\sin x}-\sin x=\csc x-\sin x$

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2 years ago

Jack Frost is looking at internet service plans. A local company offers a one-month plan for $39.95 or a two-month plan for $68.

bija089 [108]

Answer:

$10.93

Step-by-step explanation:

If Jack got the one month plan for two months, he would have to pay $39.95 twice.

Cost of jack getting the one month plan for two months = $39.95 x 2 = $79.90

Money saved = cost of the one month plan for two months - cost of the two months plan

$79.90 - $68.97 = $10.93

4 0

2 years ago

Do you know what is 1/5 of 35

deff fn [24]

Answer:

Step-by-step explanation:

Because 35/5=7 so 1/5 of 35 would = 7

7 0

3 years ago

Read 2 more answers

If you were to use the substitution method to solve the following system, choose the new

mestny [16]

Answer:

23x = -115

Step-by-step explanation:

In the substitution method, you must solve for 1 variable in 1 equation to replace it in the other equation. For the system:

2x - 7y = 4

3x + y = -17

Solving for y in the second equation:

y = -17 - 3x

Replacing y in the first equation:

2x - 7(-17 - 3x) = 4

2x + 119 + 21x = 4

23x = -115

This is the new equation after use the substitution method.

5 0

3 years ago

Which equation represents y = −x2 + 6x + 7 in vertex form? y = −(x + 3)2 + 4 y = −(x − 3)2 + 10 y = −(x + 3)2 + 2 y = −(x − 3)2

Colt1911 [192]

$\text{The vertex form:}\ y=a(x-h)^2+k\\\\f(x)=ax^2+bx+c\to h=\dfrac{-b}{2a},\ k=f(h)\\\\\text{We have}\ y=-x^2+6x+7\to f(x)=-x^2+6x+7\\\\a=-1,\ b=6,\ c=7\\\\h=\dfrac{-6}{2(-1)}=\dfrac{-6}{-2}=3\\\\k=f(3)=-3^2+6(3)+7=-9+18+7=16\\\\Answer:\ \boxed{y=-(x-3)^2+16}$

8 0

3 years ago