Victor3756

29.06.2019 • 

Mathematics

Lisa invest $4000 in two types of bonds , bond a and bond b a offers 10%return . lisa invest $x and $y inbond b her tostados investment is 350. the system of linear equations defining the situation is a.x+y=4000and 10x+6y=340 b. x+y=4000and 0.06x+0.1y=340 c.x+y=340and 0.1x+0.06y=4000 d. x+y=4000and 0.1x+0.06y=340 the amount lisa invest ed at the rate of 10%is a.1000 b.1500 c2500 d3500 and the amount she invested at the rate of 6%is a. 500 b1500 c2500 d3000

Ответ:

berliedecius4051

29.05.2020

Mathematics

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x+y=4000(1)

10x+6y=340*100⇒5x+3y=17000(2)

(2)- 3*(1)⇒ 2x=5000⇒x=2500,y=4000-2500=1500

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Ответ:

deena7

02.02.2021

Mathematics

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We let y equal to the elevation above sea level so that the elevation of the rock climber after x minutes of climbing would be:

y = 2x + 50

His initial height can be calculated when x is equal to zero it is when the climber is not yet climbing. Therefore, the rock climber'sinitial height above sea level would be 50 meters.

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