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2 years ago

2x-(10+4x)=3x-7 what is the answer

Mathematics

1 answer:

ZanzabumX [31]2 years ago

6 0

X=-3/5

3
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5
X=-3/5 would be the answer

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Janelle bought a beach chair on sale at 70% off. The original price was $59.99. Round answers to the nearest cent. a. Find the a

stealth61 [152]

Answer:

A. $41.99

B. $18.00

Step-by-step explanation:

To find discount: 59.99×0.7= 41.99

To find sales price: 59.99-41.99=18

8 0

2 years ago

Please help you get alot of points

Lorico [155]

The answer u r looking for is* D, $2.85. Hope I’ve helped ;)

5 0

2 years ago

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A plane flying horizontally at an altitude of "1" mi and a speed of "430" mi/h passes directly over a radar station. Find the ra

Anika [276]

Answer:

The rate at which the distance from the plane to the station is increasing when it is 2 mi away from the station is 372 mi/h.

Step-by-step explanation:

Given information:

A plane flying horizontally at an altitude of "1" mi and a speed of "430" mi/h passes directly over a radar station.

$z=1$

$\frac{dx}{dt}=430$

We need to find the rate at which the distance from the plane to the station is increasing when it is 2 mi away from the station.

$y=2$

According to Pythagoras

$hypotenuse^2=base^2+perpendicular^2$

$y^2=x^2+1^2$

$y^2=x^2+1$ .... (1)

Put z=1 and y=2, to find the value of x.

$2^2=x^2+1^2$

$4=x^2+1$

$4-1=x^2$

$3=x^2$

Taking square root both sides.

$\sqrt{3}=x$

Differentiate equation (1) with respect to t.

$2y\frac{dy}{dt}=2x\frac{dx}{dt}+0$

Divide both sides by 2.

$y\frac{dy}{dt}=x\frac{dx}{dt}$

Put $x=\sqrt{3}$ , y=2, $\frac{dx}{dt}=430$ in the above equation.

$2\frac{dy}{dt}=\sqrt{3}(430)$

Divide both sides by 2.

$\frac{dy}{dt}=\frac{\sqrt{3}(430)}{2}$

$\frac{dy}{dt}=372.390923627$

$\frac{dy}{dt}\approx 372$

Therefore the rate at which the distance from the plane to the station is increasing when it is 2 mi away from the station is 372 mi/h.

6 0

3 years ago

The greater rnge is the boys or the grls or neither as it is the same

maks197457 [2]

Range for boys = 20-8 = 12
Range for girls = 15-3 = 12
Range is same for both boys and girls.

median of boys = 12.5
median for girls = 6.5
Median is greater for the boys.

Hope it helps!

5 0

2 years ago

Read 2 more answers

Match the following proofs to each other. The answers there I guessed on but most likely not right. I need help. My grade is not

DanielleElmas [232]

Step-by-step explanation:

6 0

2 years ago