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2 years ago

Someone pls help! 3x ^2 and x = 10 pls help!

Mathematics

2 answers:

otez555 [7]2 years ago

7 0

Answer:

300

Step-by-step explanation:

Because of PEMDAS (Order of Operations), you would do the exponent first.

So, 3(x)^2 and 3(100)

Then you get 300

Hope this helps!

True [87]2 years ago

6 0

Answer:

300

Step-by-step explanation:

3(10^2)

3(100)

300

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Please help.. nobody will help me and I’ve been asking this question so many times but nobody will answer..

lisov135 [29]

Answer:

The floor covers $81yd^{2}$

Step-by-step explanation:

This question is actually easier than you think, but I am here to help.

First off you know the room is a square. All squares have equal sides no matter what, that is the number 1 basic rule. (27ft by 27ft)

1. Find the area of the square: To find area you multiply Length by Width. Since you are multiplying two units you will get a squared value. The square measures 27 ft by 27 ft on both sides.

Lets multiply those two numbers:

$(27 * 27) = 729ft^{2}$

We need to stay in the same unit because you are multiplying two values of the same unit. The total square feet of the room is $729ft^{2}$

2. Next, all you need to do is convert $ft^{2}$ to $yd^{2}$

Like you mentioned: $(1 yd^{2} = 9ft^{2})$

Now lets create a proportion between the two unit:

$\frac{729ft^{2} }{1} * \frac{1yd^{2} }{9ft^{2} }$

The $ft^{2}$ unit cross cancels and your left with $yd^{2}$ .

Now all you do is multiply straight across and you get $\frac{729yd^{2} }{9} = 81 yd^{2}$

5 0

4 years ago

Estimate_________rulers,or________feet a door with twelve inches ruler

IRINA_888 [86]

There are twelve inches in a ruler and a door is about 7-8 feet

7 0

3 years ago

The graph of a quadratic function does not cross the x-axis, but crosses the y-axis in one place.

natulia [17]

Answer: D

Step-by-step explanation:

A quadratic function has a degree of 2 so there will be two roots. The statement says the function does NOT CROSS THE X-AXIS so there are no real roots. That means both roots must be imaginary (complex).

5 0

3 years ago

Brian's kite is flying above a field at the end of a 68m string.If the angle of elevation to the kite measures 70 degrees,how hi

Dvinal [7]

Answer:

$h = 63.92\ m$

Step-by-step explanation:

Given:

Angle of elevation = 70°

Length of string = 68 m

We need to find the height of the kite.

Solution:

Requirement figure attached in file.

Where:

BC = 68 m

AC = h (Height of the kite)

∠ABC = 70°

Using Cosine rule to find the height of the kite.

$AC = BC\times sin(70)$

$h = 68\times 0.94$

$h = 63.92\ m$

Therefore, height of the kite from Brian's head $h = 63.92\ m$ .

4 0

4 years ago

alfredo bought a fishing pole for 60 off it's original price of $97 if the tax was 4% how much did alfredo pay for the fishing p

Agata [3.3K]

Answer:

$40.4

Step-by-step explanation:

The regular price of the fishing rod is $97

There is a 60% discount from that price.

The discount is equal to 60% of $97 which is equal to .60 * $97 which is equal to $58.2

Discount is like a markdown, so subtract $58.2 from the price of the item before the change to get $97 - $58.2 = $38.8

This is the price of the item before tax is applied.

Now you apply the sales tax of 4%.

4% of $38.8 is equal to .04 * $38.8 which is equal to $1.552

Tax is like a markup, so add $1.552 to the price of the item before tax was applied to get a selling price of $38.8 + $1.552 which is equal to $40.352

Round it up and the answer is $40.4

3 0

4 years ago