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rusak2 [61]
3 years ago
10

Choose the graph of y < -x^2 + 4x + 5 edge2020

Mathematics
1 answer:
jok3333 [9.3K]3 years ago
7 0

First one the one that has the blue inside

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Which figure shows a reflection of ​pre-image QRS​ over the line t?
il63 [147K]

Answer:

Which point would map onto itself after a reflection across the line y = -x? ... What is the pre-image of vertex A' if the image shown on the graph was created by a reflection across the ... A triangle has vertices at R(1, 1), S(-2, -4), and T(-3, -3). ... Which shows the image of quadrilateral ABCD after the transformation R0, 90°? a.

Step-by-step explanation:

7 0
2 years ago
If π is rounded to a whole number, what is a reasonable estimate for the circumference of a circle with a diameter of 9 cm? 27 c
a_sh-v [17]
The estimate would be about 28 cm
4 0
3 years ago
Read 2 more answers
Use the null hypothesis H0 : μ = 98.6, alternative hypothesis Ha: μ &lt; 98.6, and level of significance α = 0.05. 98 99.6 97.8
andrezito [222]

Answer:

The t-score is -1.8432    

Step-by-step explanation:

We are given the following in the question:  

98, 99.6, 97.8, 97.6, 98.7, 98.4, 98.9, 97.1, 99.2, 97.4, 99.1, 96.9, 98.8, 99.9, 96.8, 97, 98.7, 97.6, 98.7, 98.2

Formula:

\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}  

where x_i are data points, \bar{x} is the mean and n is the number of observations.  

Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}

Mean =\displaystyle\frac{1964.4}{20} = 98.22

Sum of squares of differences = 16.152

s = \sqrt{\dfrac{16.152}{49}} = 0.922

Population mean, μ = 98.6

Sample mean, \bar{x} = 98.22

Sample size, n = 20

Sample standard deviation, s = 0.922

First, we design the null and the alternate hypothesis

H_{0}: \mu = 98.6\\H_A: \mu < 98.6

Formula:

t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }

Putting all the values, we have

t_{stat} = \displaystyle\frac{98.22 - 98.6}{\frac{0.922}{\sqrt{20}} } = -1.8432

The t-score is -1.8432    

7 0
3 years ago
Which value of x makes the equation true? <br><br> x - 5.1 = -7.6 <br><br> x =
kherson [118]
X = -2.5 because:
-7.6+5.1= -2.5
8 0
3 years ago
Please help me for my practice problems​
Serjik [45]
Equation of a line: y = mx + b
m = slope(rise/run), b = y-intercept


1/2
y = 1/2x - 3

-7/4
y = -7/4x +4

-1/2
y = -1/2x - 3

-1/4
y = -1/4x + 2

1
y = x

-1
y = -x
7 0
3 years ago
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