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3 years ago

HELPPPP PLEASEEEE You buy dinner for the family at McDonald's. The meal totals $21.45, and

Mathematics

2 answers:

mihalych1998 [28]3 years ago

8 0

Answer:

4.05

Step-by-step explanation:

cause i know i know already

inessss [21]3 years ago

6 0

Answer:

$4.05

Step-by-step explanation:

For this problem, all you need to do is subtract $21.45 from $25.50.

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Roddy Richards invested $12014.88 in Wolverine Meat Distributors (W.M.D.) five years ago. The investment had yearly arithmetic

arlik [135]

Answer:

The arithmetic average return would be 3.96%

Step-by-step explanation:

Given,

The returns in 5 years are,

-9.7%, -8.1%, 15%, 7.2%, and 15.4%

We know that,

$\text{Arithmetic average}=\frac{\text{Sum of all observations}}{\text{Number of observations}}$

Hence,

The arithmetic average return of the investment = $\frac{-9.7-8.1+15+7.2+15.4}{5}$

$=\frac{19.8}{5}$

= 3.96%

8 0

3 years ago

If you have an email that is stressing you out and you sleep on it before emailing it, you have shown which character trait?

natulia [17]

Answer:

Self-control

Why:

Most people would feel pressured to respond to an email, you are showing self-control by resisting the urge.

3 0

3 years ago

F(x)=3x^2+4x-3 what is f(-x)

umka21 [38]

Answer:

hey bro this is the correct answer

3 0

3 years ago

You are given the polar curve r = e^θ

galina1969 [7]

The tangent to $r(\theta)=e^\theta$ has slope $\frac{\mathrm dy}{\mathrm dx}$ , where

$\begin{cases}x(\theta)=r(\theta)\cos\theta\\y(\theta)=r(\theta)=\sin\theta\end{cases}$

By the chain rule, we have

$\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{\frac{\mathrm dy}{\mathrm d\theta}}{\frac{\mathrm dx}{\mathrm d\theta}}$

and by the product rule,

$\dfrac{\mathrm dx}{\mathrm d\theta}=\dfrac{\mathrm dr}{\mathrm d\theta}\cos\theta-r(\theta)\sin\theta$

$\dfrac{\mathrm dy}{\mathrm d\theta}=\dfrac{\mathrm dr}{\mathrm d\theta}\sin\theta+r(\theta)\cos\theta$

so that with $\frac{\mathrm dr}{\mathrm d\theta}=e^\theta$ , we get

$\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{e^\theta\sin\theta+e^\theta\cos\theta}{e^\theta\cos\theta-e^\theta\sin\theta}=\dfrac{\sin\theta+\cos\theta}{\cos\theta-\sin\theta}=-\dfrac{1+\sin(2\theta)}{\cos(2\theta)}$

The tangent line is horizontal when the slope is 0; this happens for

$-\dfrac{1+\sin(2\theta)}{\cos(2\theta)}=0\implies\sin(2\theta)=-1\implies2\theta=-\dfrac\pi2+2n\pi\implies\theta=-\dfrac\pi4+n\pi$

where $n$ is any integer. In the interval $0\le\theta\le2\pi$ , this happens for $n=1,2$ , or

$\theta=\dfrac{3\pi}4\text{ and }\theta=\dfrac{7\pi}4$

i.e at the points

$(r,\theta)=\left(e^{3\pi/4},\dfrac{3\pi}4\right)$

and

$(r,\theta)=\left(e^{7\pi/4},\dfrac{7\pi}4\right)$

8 0

3 years ago

Usé the distributive property to rewrite the expression 7bx + 7by as an equivalent expression

Musya8 [376]

your answer: 7 (b+x) + 7 (b+y)
If You do the distributive property you will get:
7bx+7by

8 0

3 years ago