Someone please please help help me please please ASAP with my work And NO LINKS or FILES

Mathematics

2 answers:

Vera_Pavlovna [14]2 years ago

8 0

Answer:

Blank 1: y

Blank 2: x

Blank 1: x

Blank 2: y

Step-by-step explanation:

The reflection of a point along y-axis means the y value stays the same and the x-value changes its sign.

Blank 1: y

Blank 2: x

The reflection of a point along x-axis means the x value stays the same and the y-value changes its sign.

Blank 1: x

Blank 2: y

Fantom [35]2 years ago

4 0

Give the other person brainliest!!

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What is the sum of the first 60 positive integers?. (Points : 1). 60. . 61. . 1800. . 1830

stira [4]

Hello,

if 0 is a positive integer
sum=0+1+...+59=(0+59)*60/2=59*30=1770
else
sum=1+2+3+...+60=(1+60)*60/2=61*30=1830
end if

Answer D: 1830
In US, 0 is not positive, in Europe yes!!!

4 0

3 years ago

3. Solve for x

padilas [110]

3x + 3 − x + (−7) > 6
2x - 4 > 6
2x > 10
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2 years ago

A certain standardized test's math scores have a bell-shaped distribution with a mean of 530 and a standard deviation of 119. Co

kumpel [21]

Answer:

a) 68.2%

b) 31.8%

c) 2.3%

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 530

Standard Deviation, σ = 119

We are given that the distribution of math scores is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

a) P(test scores is between 411 and 649)

$P(411 \leq x \leq 649)\\\\= P(\displaystyle\frac{411 - 530}{119} \leq z \leq \displaystyle\frac{649-530}{119})\\\\= P(-1 \leq z \leq 1)\\\\= P(z \leq 1) - P(z < -1)\\= 0.841 - 0.159 = 0.682 = 68.2\%$