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3 years ago

Who wants to talk? Just comment. I need help on number one

Mathematics

2 answers:

Levart [38]3 years ago

7 0

Answer:

C is the answer.

First multiply the first numbers, and then subtract 4 from -7.

andreev551 [17]3 years ago

3 0

Answer:

Option C, 9 * 10^-3

Step-by-step explanation:

Step 1: Multiply

(4.5 * 10^-7) * (2 * 10^4)

9 * 10^-3

Answer: Option C, 9 * 10^-3

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Shiva bought a pen drive for Rs 460 and sold it at 5% profit. Find profit amount

MakcuM [25]

Answer:

Step-by-step explanation:

Given,

Cost Price (CP) = Rs 460

Profit % (P%) = 5%

Now,

Profit Amount (P) = P% * CP

= ( 5/100) * Rs 460

= Rs 460/20 = Rs 23

8 0

3 years ago

Select the expression that is equivalent to (2x^2 +5)-5/2

anyanavicka [17]

$▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪$

Let's solve :

${(2 {x}^{2} + 5) }^{ - \frac{5}{2} }$

$\dfrac{1}{{(2 {x}^{2} + 5) }^{ \frac{5}{2} } }$

$\dfrac{1}{ \sqrt{( 2{x}^{2} + 5) {}^{5} } }$

therefore, the correct choice is :

3 0

3 years ago

Please write an inequality using this problem Rosie is a dog walker. She wants to buy tickets for her and her best friend, Emmi,

BARSIC [14]

14(20x) > 2(174.38) note that the greater than should really be a greater than or equal to symbol, I just don't have it on my keyboard.

8 0

3 years ago

Is z=4x+9y literal or not

miskamm [114]

Answer: Yes

Explanation: The equation has 3 variables

8 0

3 years ago

Read 2 more answers

An air traffic controller spots two airplanes at the same altitude converging to a point as they fly at right angles to each oth

muminat

So.... notice the picture below

we know when y = 140 and x = 240, r = 250

so let's use the pythagorean theorem

$\bf r^2=x^2+y^2\implies 2r\cfrac{dr}{dt}=2x\cfrac{dx}{dt}+2y\cfrac{dy}{dt}\implies \cfrac{dr}{dt}=\cfrac{x\frac{dx}{dt}+y\frac{dy}{dt}}{r}
\\\\\\
\cfrac{dr}{dt}=\cfrac{240\cdot 480+70\cdot 140}{250}\implies \cfrac{dr}{dt}=500$

now... how much time does the controller have? well, say, plane "y" is going at dy/dt of 140mph, and is 70 miles away, 140 is 2*70, so it can cover those 70 miles in 1/2 hr, and when it does, it'll collide with the other,

so, the controller has that much, less than 1/2 hr

8 0

4 years ago