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Julli [10]
2 years ago
15

PLS HELP, I am literally in tears. +28 points and brainliest for the person to answer this correctly.

Mathematics
1 answer:
emmasim [6.3K]2 years ago
3 0

Answer:

All we need to do is find the value of x to solve:

14x+6/3=-8+4x

14x+6=-24+12x

2x+6=-24

2x=-30

x=-15

-3x^2-7

-3(-15^2)-7

-3(225)-7

-675-7

-682

Step-by-step explanation:

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A textile fiber manufacturer is investigating a new drapery yarn, which the company claims has a mean thread elongation of 12 ki
shepuryov [24]

Answer

given,

mean = 12 Kg

standard deviation = 0.5 Kg

assume the observed statistic is = 11.1

 now, \bar{X}=11.1 , \mu = 12 , \sigma = 0.5

assuming the number of sample = 4

n = 4

Hypothesis test:

H₀ : μ≥ 12

Ha : μ < 12

now,

significant level α = 0.05

z* = \dfrac{\bar{X}-\mu}{\dfrac{\sigma}{\sqrt{n}}}

z* = \dfrac{11.1-12}{\dfrac{0.5}{\sqrt{4}}}

     z* = -3.60

Test statistics, Z* = -3.60

P-value

P(Z<-3.60) = 0.002 (from z- table)

P- value = 0.002

now,

reject the value of H₀ when P-value < α

    0.002 < 0.05

since, it is less P-value < α , we have to reject the null hypothesis

5 0
3 years ago
What is the volume of a cube 1 1/2 inches wide 2 1/2 inches long and 4 inches high?
mel-nik [20]

Answer:

231

Step-by-step explanation:

first of all it must be a cuboid bcoz a cube's edge is same i.e length =breadth= height.

now volume of cuboid =lbh

11/2×21/2×4

=231

ans....

6 0
2 years ago
Read 2 more answers
A line passes throughout (-3,-2) and is perpendicular to 3x-2y=7. What is the equation of the line in slope-intercept form? A. Y
marissa [1.9K]
3x - 2y = 7
-2y = -3x + 7
y = 3/2x - 7/2....slope of this line is 3/2. A perpendicular line will have a negative reciprocal slope. All that means is " flip " the slope and change the sign. So the slope we need is -2/3 (see how I flipped the slope and changed the sign)

y = mx + b
slope(m) = -2/3
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now we sub and find b, the y int
-2 = -2/3(-3) = b
-2 = 2 + b
-2 - 2 = b
-4 = b

so ur perpendicular equation is : y = -2/3x - 4 <==
6 0
3 years ago
Kate has a rectangular garden that is 8 feet long by 3 feet wide. She wishes to extend the length and width by the same amount i
elena55 [62]
<span>Let the extension of the length and width be x.
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 Therefore,
(8+x)(3+x) = 104
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4 0
3 years ago
What is d?<br> 2/3 x d = 40
lys-0071 [83]

Answer:

60

Step-by-step explanation:

2/3*d=40

d=40*3/2

d=60

3 0
3 years ago
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