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qwelly [4]
3 years ago
5

One-Step Equations:

Mathematics
2 answers:
Charra [1.4K]3 years ago
6 0
1. x= 18.4
2.x=12.3
3.x=6.4
4.z=5.8
5.x=-1/2
6.x=7/18
7.x=-9
8.z=18
9.x=7
erastova [34]3 years ago
3 0
9. X=7. 7-8=-1

8. X=18. 18-7=11
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Solve the equation 4x²+4x+1=0​
Natasha2012 [34]

Answer: x = -1/2

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Step-by-step explanation:

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the sum of −2x2 + x + 31 and 3x2 + 7x − 8 can be written in the form ax2 + bx + c, where a, b, and c are constants. What is the
Kitty [74]

Answer:

a+b+c=32

Step-by-step explanation:

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(-2x^{2}+3x^{2})+(x+7x)+(31-8)

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8 0
3 years ago
Consider a population consisting of the number of teachers per college at small 2-year colleges. Suppose that the number of teac
agasfer [191]

Answer:

a) \frac{8}{9} =0.89

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Step-by-step explanation:

we know that

P(║ x -\mu║ \leq  k\sigma) \geq 1 -\frac{1}{k^2}

so, \mu = 150, \sigma = 20

k =  \frac{210 - 150}{20} =\frac{150 - 90}{20} = 3

P(║ x -150 ║ \leq  3\times 20) \geq 1 -\frac{1}{3^2} = \frac{8}{9}

x - N(150, 20^2)

P(X \leq 170) = 0.8413447

check

P norm = \frac{170 - 150}{20}= 0.8413447

8 0
3 years ago
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