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garri49 [273]
3 years ago
9

PLS HELP. I'M BEHIND.

Mathematics
1 answer:
Viktor [21]3 years ago
8 0
Hello,

The answer to your question would be D. (-3/2)


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A regular triangular pyramid has a base area of 31.5 mm2 and a surface area of
Virty [35]

Answer:

A) 220.5 mm^2

Step-by-step explanation:

<u>Explanation</u>:-

Given A regular triangular pyramid has a base of area is 31.5mm^2

and also given surface area of triangular pyramid is 252 mm ^2

by using formula

surface area of  regular triangular pyramid = base of area + half of lateral surface.

surface area = area of the pyramid X \frac{1}{2} lateral surface

252 = 31.5 + \frac{1}{2} lateral surface

252-31.5= \frac{1}{2} lateral surface

220.5 = lateral area of triangular pyramid

lateral area of triangular pyramid = 220.5 mm^2

6 0
3 years ago
A Local group claims that the police issue more than 60 speeding tickets a day in thire area. To prove their point, they randoml
MissTica

Answer:

The group's claim is not supported at 1% significance level.

Step-by-step explanation:

given that a local group claims that the police issue more than 60 speeding tickets a day in thire area

The data they collected for 2 weeks is given below:

70 48 41 68 69 55 70

57 60 83 32 60 72 58

\bar x = 60.2\\s = 12.9\\n=14

Std error of mean = \frac{12.9}{\sqrt{14} } \\=3.4477

H_0: \bar x=60\\H_a: \bar x >60

(Right tailed test at 1% significance level)

Mean difference = 0.10

Test statistic t with df 13 = mean difference/std error

= 0.029

p value = 0.4886

Since p >0.01, we accept null hypothesis

The group's claim is not supported at 1% significance level.

7 0
2 years ago
Solve x^2-8x+14=2x+7
LuckyWell [14K]

Answer:

Step-by-step explanation:

x²-8x+ 14 =2x+7

x² - 8x +14 - 2x - 7 = 0

x² - 10x  + 7 = 0

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3 years ago
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Andrews [41]

Answer:

B is the correct answer accordingly to your question

7 0
2 years ago
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Part A: Identify the point that is an x-intercept in order from left to right (1st)
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Answer:

Using a Graph of a Line Identify the x-axis. A coordinate graph has a y-axis and an x-axis. The x …

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Using the Quadratic Formula Determine that the equation of the line is a quadratic equation. A

Step-by-step explanation:

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2 years ago
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