3 years ago

Write an equation of the direct variation that includes the point (–10, –17).

Mathematics

1 answer:

Olin [163]3 years ago

7 0

It would be B. y = -17/10X

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What is the value of y in this system of equations: 3x + y = 9 y = –4x + 10 ?

Ahat [919]

3x + y = 9 (I)
y = –4x + 10 (II)
------------------------
 $\left \{ {{3x + y = 9 } \atop {y = -4x + 10 }} \right.$

Pass the incognito "4x" to the first term, changing the signal when changing sides.
-------------------------
simplify by (-1)
 $\left \{ {{3x + y = 9.(-1)} \atop {4x + y = 10 }} \right.$ 

-------------------------
 $\left \{ {{- 3x - \diagup\!\!\!\!y =-9} \atop {4x + \diagup\!\!\!\!y = 10}} \right. 
$

-------------------------
 $\left \{ {{- 3x = - 9} \atop {4x = 10}} \right.$ 

-----------
 $\boxed{x = 1}$ 

Substitute in equation (I) to find the value of "Y".

3x + y = 9 (I)
3*(1) + y = 9
3 + y = 9
y = 9 - 3
$\boxed{y = 6}$

Answer:
$\boxed{\boxed{ \left \ {{x=1} \atop {y=6}} \right. }}$

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3 years ago

Christina rolls a number cube twice.What is the probability she rolls a prime number and then an odd number?

Arisa [49]

The probability is 3/6 (1/2) as there are 3 prime numbers on a dice (2,3,5) and also 3 odd numbers on a dice (1,3,5)

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3 years ago

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You work at a flower shop designing bouquets. You need to create bouquets of roses and calla lilies for a wedding. Calla lilies

Ierofanga [76]

64x2.40 = 153.6
64x1.90 = 121.6

add 153.6 to 121.6

275.2

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