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Elan Coil [88]
2 years ago
9

WILL GIVE BRAINLIEST! what is the value of -x - y if -x=(-1/5) and y=(-7/15)

Mathematics
1 answer:
omeli [17]2 years ago
4 0

Answer: 20

Step-by-step explanation:

since i helped can i have brainlist please :D

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Matt and Mark went to El Rodeo to have some dinner. Matt ordered 3 tacos and 2 enchiladas, which cost him $4.93. Mark ordered 2
lord [1]

Answer:

The cost of one taco is $0.87 and the cost of one enchilada is $1.16

Step-by-step explanation:

Let the cost of tacos be X

and cost of enchiladas be y

So, by using given data, we have following equations

3X + 2Y = 4.93             (1)

2X + 4Y = 6.38             (2)

So, first multiply 1st equation by 2 and 2nd equation by 3, then subtracting 1st equation by 2nd.

= 2 × ( 3X + 2Y = 4.93)       (1)

= 3 × (2X + 4Y = 6.38)        (2)

= - (6X + 4Y = 9.86)              (1)

= 6X + 12y = 19.14            (2)

= 8Y = 9.28

Y = 9.28 ÷ 8 = 1.16

By putting the value of Y in equation 1, we get

3X + 2(1.16) = 4.93

3X + 2.32 = 4.93

X = 2.61 ÷ 3 = 0.87

Hence, the cost of one taco is $0.87 and the cost of one enchilada is $1.16.

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Brian has reduced his cholesterol level by 6% by following a strict diet and regular exercise. If his original level was 280, wh
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Answer:

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Step-by-step explanation:

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C = what ever the algebraic pharse is standing for c can equal to what ever number there is
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Answer:

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Step-by-step explanation:

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