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Alecsey [184]
3 years ago
7

3х +4y = 15 3х -y= 30 can someone help please

Mathematics
2 answers:
Alla [95]3 years ago
6 0

Answer:

have you tried photomath I'll do ut then try to give you an answer

german3 years ago
3 0

Answer:

1. x = -4/3y + 5

2. x = 1/3y+10

Step-by-step explanation:

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If 6(2b-4) = 0, then b=?
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b=2

Step-by-step explanation:

<em>W</em><em>e</em><em> </em><em>f</em><em>i</em><em>s</em><em>t</em><em> </em><em>o</em><em>f</em><em> </em><em>a</em><em>l</em><em>l</em><em> </em><em>o</em><em>p</em><em>e</em><em>n</em><em> </em><em>t</em><em>h</em><em>e</em><em> </em><em>b</em><em>r</em><em>a</em><em>c</em><em>k</em><em>e</em><em>t</em><em>s</em><em>.</em>

<em>6</em><em>(</em><em>2</em><em>b</em><em>-</em><em>4</em><em>)</em><em> </em><em>=</em><em>0</em>

<em>=</em><em> </em><em>1</em><em>2</em><em>b</em><em>-</em><em>2</em><em>4</em><em>=</em><em>0</em>

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<em>(</em><em> </em><em>whenever</em><em> </em><em>a</em><em> </em><em>sign</em><em> </em><em>crosses</em><em> </em><em>over</em><em> </em><em>an</em><em> </em>equal to <em>sign</em><em> </em><em>it</em><em> </em><em>changes</em><em>)</em>

<em>1</em><em>2</em><em>b</em><em> </em><em>=</em><em> </em><em>0</em><em>+</em><em>2</em><em>4</em><em> </em>

<em>1</em><em>2</em><em>b</em><em>=</em><em>2</em><em>4</em>

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5 0
2 years ago
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PLZ ANSWER WILL MARK BRAINLIEST​
guapka [62]

Answer:

I think the answer is C Angle-Angle-Side im not sure if im accurate but i hope it helps

Step-by-step explanation:

7 0
3 years ago
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kiruha [24]

Answer:

I think the answer is 25%

Step-by-step explanation:

4 0
3 years ago
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kumpel [21]

Answer:

standard error = 1.63

Step-by-step explanation:

To calculate the standard error we need to know the standard deviation (σ) and the sample size (n) (see the attached formula).

To obtain the standard deviation we use the given sample variance of 77.4 years:

σ²= variance

Therefore:

σ = √77.4 = 8.8

Now we can calcuate the estimated standard error:

standard error = σ /√n = 8.8/√29 = 1.63

The standard error gives us an estimation about how far the mean of the sample is from the mean of the entire population, and in this case is 1.63.

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Answer:1 jar = 2 × 8 = 16 ounces. So, number of jars required to fill 1 gallon of blue paint is : Therefore, 8 jars are required to fill 1 gallon of blue paint.

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3 years ago
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