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luda_lava [24]
3 years ago
9

-2x-y=0 -6x+y=10 What is my solution for this ? (Eliminations)

Mathematics
1 answer:
MariettaO [177]3 years ago
7 0
I hope is correct

-5/4,
5/2

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kelly bought some stuffed animals for 6.49 each she also got a box fo chocolate for 8.32 she paid a total of 27.79 to write an e
katrin [286]

Answer:

3

Step-by-step explanation:

She only bought one chocolate so you will subtract 8.32 from her total, 27.79, when you do that you will get 19.47.  You do that so you can know the total of the stuffed animals by them self.  Then all you have left in the total is her stuffed animals so you divide 19.47 by 6.49, when you do that you get three, so that means that she got three stuffed animals.

8 0
3 years ago
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ABC is reflected across x = 1 and y = -3. What are the coordinates of the reflection image of A after both reflections?
tangare [24]
(7, -2).

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4 0
4 years ago
The speeds of vehicles traveling on a highway are normally distributed with a population standard deviation of 7 miles per hour
True [87]

Answer:  (56.03\ ,63.97)

Step-by-step explanation:

Given : The speeds of vehicles traveling on a highway are normally distributed .

Standard deviation: \sigma: 7

Since , sample size : n=20 , which is small sample (n<30) so the test applied here is a t-test.

Degree of freedom= n-1=20-1=19

Sample mean : \overline{x}=60

Level of significance : 1-\alpha:0.98

Then , significance level : \alpha: 1-0.98=0.02

Using t-distribution table , Critical value : \text{t-score}=t_{n-1, \alpha/2}= 2.539483

The confidence interval for population mean is given by :-

\overline{x}\pm t_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}

60\pm( 2.539483)\dfrac{7}{\sqrt{20}}\approx60\pm3.97=(56.03\ ,63.97)

Hence, a 98% confidence interval for the population mean=(56.03\ ,63.97)

4 0
3 years ago
Olivia buys 6 packs of muffins. she uses a Coupon and saves $3 off the total.
lyudmila [28]

Answer:

B

Step-by-step explanation:

the six(6) muffins plus the $3 she saved

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Step-by-step explanation:

All bad girls come to see and show

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come see my big d

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3 years ago
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