3 years ago

If josie missed 20 questions how many didi she get right

Mathematics

2 answers:

hodyreva [135]3 years ago

8 0

The number of her correct answers is

(the total number of questions on the test) minus (20) .

prisoha [69]3 years ago

4 0

Hey it's okay I feel you i have the same Question but no one will answer

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Which of the following points lies on the line 2x+3y=5

Romashka [77]

Answer:

1,1

Step-by-step explanation:

Basically you enter this equation into a graphing calculator and see which x and y value match and those are your points . Or you can substitute values in for x by isolating y by itself

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3 years ago

I’m not sure how to do this problem

strojnjashka [21]

The first one would be x^12

6 0

3 years ago

Am I dealing with harmonic stuff (trig)?

pochemuha

You just need to solve for when $y=0$ :

$\dfrac{\cos8t-9\sin8t}4=0\implies\cos8t-9\sin8t=0$

$\implies\cos8t=9\sin8t$

$\implies\dfrac19=\dfrac{\sin8t}{\cos8t}=\tan8t$

$\implies8t=\tan^{-1}\dfrac19+n\pi$

$\implies t=\dfrac18\tan^{-1}\dfrac19+\dfrac{n\pi}8$

where $n$ is any integer. We only care about when $0\le t\le1$ , which happens for $n\in\{0,1,2\}$ .

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$t=\dfrac18\tan^{-1}\dfrac19+\dfrac\pi8\approx0.41$

$t=\dfrac18\tan^{-1}\dfrac19+\dfrac\pi4\approx0.80$

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3 years ago

What is the value of y?

icang [17]

Y= 5.91 yup that’s the answer

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3 years ago

Algebra <br><br> A) 50+Z=81 <br> Explain.

Ivan

Answer:31

Step-by-step explanation:

You subtract 81 and 50

5 0

3 years ago

Read 2 more answers