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vazorg [7]
3 years ago
15

Y=3x^2+11x-4 and y=10x-1. solve the system of equations

Mathematics
1 answer:
Mashcka [7]3 years ago
7 0
3x^2+11x-4=10x-1
3x^2+11x-10x-4+1=0
3x^2+x-3=0
Δ=1^1-4*3*(-3)=1+36=37
x1=(-1+V37)/6

x2=( -1-V37)/6
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The Ratio of two numbers is 3/5, and their sum is 104. What are the 2 numbers?
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Answer:

39 and 65

Step-by-step explanation:

the ratio of the two numbers is 3 : 5

sum the parts of the ratio, 3 + 5 = 8 parts

divide the sum by 8 to find the value of one part of the ratio

104 ÷ 8 = 13 ← value of 1 part of the ratio , then

3 parts = 3 × 13 = 39

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the two numbers are 39 and 65

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2 years ago
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3 0
2 years ago
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1.22%

Step-by-step explanation:

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4 0
2 years ago
What is 9| - z/3| + 6 < 30
Reil [10]
9|⁻¹/₃z| + 6 < 30
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9|⁻¹/₃z| + 6 < 30    or    9|⁻¹/₃z| + 6 > -30
9(¹/₃z) + 6 < 30    or    9(¹/₃z) + 6 > -30
     3z + 6 < 30       or       3z + 6 > -30
           - 6   - 6                       - 6     - 6
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            3      3                         3       3
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Solution Set: {z|z < 8 or z > -8} and (-∞, 8) or (-8, ∞)
4 0
2 years ago
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