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katrin [286]
2 years ago
7

Numbers and Operations KA 8th grade- correct answers only ty, and have a great day folks (7 pts)

Mathematics
2 answers:
Morgarella [4.7K]2 years ago
4 0

Answer:

it's c

Step-by-step explanation:

khan academy

nalin [4]2 years ago
3 0

Answer:c

Step-by-step explanation:

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I need so much help with these could you help me?
juin [17]

Answer:

Step-by-step explanation:

In ΔBCA and ΔDCA,

BC ≅ CD                 Given

∠BCA ≅∠DCA        Given

AC ≅ AC                    Reflexive property

ΔBCA ≅ ΔDCA          S A S congruent

∵ BA ≅ AD                CPCT {Corresponding part of congruent triangle}

8 0
3 years ago
Guys idek the answer my iq is -.08 whats 2+1+3+4+5+6+7+8+9=45
Artist 52 [7]

Answer:

lol

Step-by-step explanation:

8 0
3 years ago
The lengths, in inches, of adult corn snakes are normally distributed with a population standard deviation of 6 inches and an un
liubo4ka [24]

Answer: 2.460

Step-by-step explanation:

The formula of Margin of Error for (n<30):-

ME=t_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}

Given : Sample size : n= 18

Level of confidence = 0.90

Significance level : \alpha=1-0.90=0.1

Using the t-distribution table ,

Critical value : t_{n-1, \alpha/2}=t_{17,0.05}= 1.7396

Standard deviation: \sigma=\text{ 6 inches }

Then, we have

ME=( 1.7396)\dfrac{6}{\sqrt{18}}\approx2.460

Hence, the margin of error (ME) of the confidence interval with a 90% confidence level = 2.460

5 0
3 years ago
The perimeter of a rectangle is 20 centimeters. The length is 6 centimeters. What is the area of the rectangle?
I am Lyosha [343]
2x + 2y = 20
2(6) + 2y = 20
12 + 2y = 20
2y = 8
y = 4
width = 4

Area = 6 × 4
= 24 cm
3 0
3 years ago
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46 and one forth percent as a fraction in simple as form
SOVA2 [1]
46 1/4% = 46.25/100 = 23.125/50
4 0
4 years ago
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