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3 years ago

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Which of the following is a quadratic function?

1 answer:

alexira [117]3 years ago

7 0

Answer:

Quadratic function. is a function that can be written in the form f(x)=ax^2+bx+c, where a, b & c are real numbers and a is not equal to zero. Parabola. a plane curve formed by the intersection of a right circular cone and a plane parallel to an element of the curve. Parent Function.(:

Step-by-step explanation:

hope it helps (:

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Scarlet built a scale model of a ship, using the scale 3 : 32. The measurements of the model are given in the table. Dimension M

FrozenT [24]

$\dfrac{\text{length of model}}{\text{length of ship}}=\dfrac{3}{32}\\\\\text{substitute}\\\\\dfrac{17}{x}=\dfrac{3}{32}\ \ \ |\text{cross multiply}\\\\3x=17\cdot32\\\\3x=544\ \ \ |:3\\\\x=\dfrac{544}{3}\approx181\ (in)$

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3 years ago

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Surface area help plz

lana [24]

Answer:

486 mm

Step-by-step explanation:

solve each side on it's own first

First 2 rectangles: 288 mm all together

2 rectangle: 144 mm

Triangles: 54 mm

Then add rectangles and triangles:

288 mm + 144 mm + 54 mm = 486 mm

8 0

3 years ago

supervisor records the repair cost for 25 randomly selected dryers. A sample mean of $93.36 and standard deviation of $19.95 are

Simora [160]

<h2><u>Answer with explanation:</u></h2>

The confidence interval for population mean (when population standard deviation is unknown) is given by :-

$\overline{x}-t^*\dfrac{s}{\sqrt{n}}< \mu$

, where n= sample size

$\overline{x}$ = Sample mean

s= sample size

t* = Critical value.

Given : n= 25

Degree of freedom : $df=n-1=24$

$\overline{x}= \$93.36$

$s=\ $19.95$

Significance level for 98% confidence interval : $\alpha=1-0.98=0.02$

Using t-distribution table ,

Two-tailed critical value for 98% confidence interval :

$t^*=t_{\alpha/2,\ df}=t_{0.01,\ 24}=2.4922$

⇒ The critical value that should be used in constructing the confidence interval = 2.4922

Then, the 95% confidence interval would be :-

$93.36-(2.4922)\dfrac{19.95}{\sqrt{25}}< \mu$

$=93.36-9.943878< \mu$

$=93.36-9.943878< \mu$

$=83.416122< \mu$

Hence, the 98% confidence interval for the mean repair cost for the dryers. = $83.4161$

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3 years ago

What is the slope of the line represented by the equation y=x/4-€

sveticcg [70]

Y = x/4 - <span>€

y = (1/4)x - </span><span>€
</span><span>
y = 0.25x - </span>€ comparing to y = mx + c

m = slope = 0.25 or (1/4)

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3 years ago

Find the x-intercept<br> y = -3x + 12

Romashka-Z-Leto [24]

Answer:

x-intercept= -4

I could be wrong though

Step-by-step explanation:

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3 years ago

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