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3 years ago

A New cell phone cost $225. The accessories cost 13% of the cell phone price. What is the cost of the accessories?

Mathematics

1 answer:

Anvisha [2.4K]3 years ago

3 0

$29.25 use a calculator, 225 - 13% = 195.75, 225 - 195.75 = 29.25

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Find the value of the expression 4a4 − 2b2 + 40 when a = 2 and b = 7.

Makovka662 [10]

4 a⁴ - 2 b² + 40 :

4 * ( 2⁴) - 2 * ( 7²) + 40 =

4 * 16 - 2 * 49 + 40 =

64 - 98 + 40 =

-34 + 40 =

+ 6

<span>hope this helps!</span>

4 0

2 years ago

Find the tangent line equation of the curve at the given point. Y=arcsin(7x) at the point where x=sqrt2/14

Mumz [18]

Answer:

$Y-\frac{\pi}{2} =\frac{\pi}{2} (x+\sqrt{\frac{1}{7}})$

Step-by-step explanation:

The equation of the curve is

$Y = sin^{-1}(7x)$

To find the equation of tangent we need to differentiate this equation w.r.t x

So, differentiating we get

$Y'=\frac{7}{\sqrt{1-49x^2} }$

This would give the slope of the tangent line at any given point of which x coordinate is known. In the present case it is $x = \sqrt{\frac{1}{7} }$

Then slope would accordingly be

$Y'=\frac{7}{\sqrt{1-49/49} }$

= ∞

For, $x = \sqrt{\frac{1}{7} }$ , $Y = sin^{-1}(7/7)= \pi/2$

Equation of tangent line, in the point slope form, would be $Y-\frac{\pi}{2} =\frac{\pi}{2} (x+\sqrt{\frac{1}{7}})$

4 0

3 years ago

if the 300 inspected light bulbs represent 20% of an hour's total production of light bulbs, how many light bulbs are produced i

KIM [24]

Hi there!
So to get this we just need to multiply 300 by 5 because it is 1/5 of the hour work. 300 x 5 = 1500 light bulbs. Hope this helps!

6 0

3 years ago

An airplane can seat up to 175 passengers. The airline has already sold 87 tickets for a flight on the airplane. Which

spayn [35]

The inequality is solved, and then, the graph is given at the end of this question.

------------------

87 tickets have already been sold.
x can still be sold.
In total, the number of tickets sold is 87 + x.
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$87 + x \leq 175$

$x \leq 175 - 87$

$x \leq 88$

The solution is given on a graph at the end of this answer.

A similar problem is given at brainly.com/question/24132092

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1 year ago

Which ordered pair is a solution of the equation y=-9x+4

dmitriy555 [2]

I'm gonna gonna go with C

8 0

3 years ago

Read 2 more answers