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3 years ago

LOROWANIE Solve the system using elimination. 3x + 10y = -4 2x + 2y = 2 ([?], [ ]

Mathematics

1 answer:

LUCKY_DIMON [66]3 years ago

6 0

Answer:

x+y=10

x+y=10-3

x+y=7

xy²=7

answer 7

hope that helps

Step-by-step explanation:

Brainliest?

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0.39<br> which is best buy<br> 0.41<br> 0.4.

Nana76 [90]

Answer:

0.39 because it's the cheapest / least

Step-by-step explanation:

Ok so we are trying to find the least. So first line up your decimals as shown below

<u>Tens</u> <u>Tenths</u> <u>Hundredths</u>

<h3> 0 . 3 9</h3><h3>---------------------------------------</h3><h3> 0 . 4 1</h3><h3>---------------------------------------</h3><h3> 0 . 4 0 ---> Imaginary 0</h3><h3 />

Now fill in any empty spaces with a 0 as shown in the decimal 0.4, your decimal will still have the same amount because 0.4 = 0.40 = 0.400 no matter how many 0's you put in the decimal.

When your done with placing 0's, look at the numbers in the first column, the Tens column. As you can see we have the numbers 0, 0, 0. They're all the same so we don't have to worry about that. Now lets go to the next column, the Tenths column. We have the numbers 3, 4, 4. Remember, we are finding the least amount. we know 3 is less than 4 so the decimal with the 3 in the Tenths place is the best buy. If these numbers were the same we would go on to the next place, the Hundredths place. If 2 of the decimals had a 3 in the Tenths place, you would eliminate the decimal with no 3 in the Tenths place and go on to the next place using only the decimals you have left.

So, <em>0.39</em> is the best buy.

Hope this helps you and makes Sense! :)

This is NOT copy pasted, I actually wrote all of this so that the person reading this answer can understand what I'm trying to explain.

Thank you, and have a Great Day! ;)

5 0

3 years ago

9c + 1 = 10 <br><br>whats the answer..?

stepladder [879]

Answer:

c = 1

Step-by-step explanation:

9 x 1 + 1 = 10

Hope this helps!

5 0

3 years ago

Read 2 more answers

I need help with this question about Triangle Congruence Postulates...

Pavel [41]

In order to prove that the triangles are congruent by SAS (Side Angle Side) you would have to assume that side AB and AD are equal (isosceles triangle) so that the base angles, angle ABC and angle ADC are congruent. So once you know that two sides and the angle in between them are indeed congruent you can reason for SAS.

7 0

4 years ago

Y=x +2 and y= -3x<br> y=-x - 2 and 2x-3y = -9<br> y= 2x -1 and y= x +1<br> x-2y = -25 and 3x -y = 0

Valentin [98]

1. (-0.5,1.5)
2. (-3,1)
3. (2,3)
4. (5,15)

3 0

4 years ago

The weights of steers in a herd are distributed normally. The standard deviation is 200lbs and the mean steer weight is 1000 lbs

ElenaW [278]

Answer:

0.9466 = 94.66% probability that the weight of a randomly selected steer is between 639 and 1420lbs.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 1000, \sigma = 200$

Find the probability that the weight of a randomly selected steer is between 639 and 1420lbs.

This is the pvalue of Z when X = 1420 subtracted by the pvalue of Z when X = 639. So

X = 1420

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{1420 - 1000}{200}$

$Z = 2.1$

$Z = 2.1$ has a pvalue of 0.9821

X = 639

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{639 - 1000}{200}$

$Z = -1.805$

$Z = -1.805$ has a pvalue of 0.0355

0.9821 - 0.0355 = 0.9466

0.9466 = 94.66% probability that the weight of a randomly selected steer is between 639 and 1420lbs.

7 0

4 years ago

Read 2 more answers

LOROWANIE Solve the system using elimination. 3x + 10y = -4 2x + 2y = 2 ([?], [ ]​

LOROWANIE Solve the system using elimination. 3x + 10y = -4 2x + 2y = 2 ([?], [ ]