3 years ago

Write and evaluate the expression. Then, check all that apply.

Mathematics

1 answer:

dlinn [17]3 years ago

8 0

Answer:

a-90

=102-90

=12

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Will give brainliest!!

yawa3891 [41]

Answer:

$r=\frac{9\cos \theta}{\sin^2 \theta}$

Step-by-step explanation:

The given equation in rectangular coordinates is;

$y^2=9x$

We use the relation;

$x=r\cos \theta$

and

$y=r \sin \theta$

This implies that;

$(r \sin \theta)^2=9(r \cos \theta)$

$r^2 \sin^2 \theta=9r \cos \theta$

Divide through by r to get;

$r \sin^2 \theta=9\cos \theta$

Divide both sides by $\sin^2 \theta$

$r=\frac{9\cos \theta}{\sin^2 \theta}$

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3 years ago

What is the area of a rectangle with a length of 3 cm and a width of 4.5 cm?

dolphi86 [110]

Answer:

13.5

Step-by-step explanation:

What is the area of a rectangle with a length of 3 cm and a width of 4.5 cm?

1.5 cm2

6.75 cm2

7 cm2

13.5 cm2 this one

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2 years ago

Don’t understand this question will give brainless thing

____ [38]

The answer is 6.33 units.

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2 years ago

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Which function represents the graph of f(s)=-4[x] after it is translated 3 units down?

MaRussiya [10]

I'm not sure but I think, f(s)=-4[x]-3

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2 years ago

What is the following sale price for a phone charger with an original price of $1.99 after applying a discount of 20%

Zarrin [17]

Answer:

$1.59

Step-by-step explanation:

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2 years ago