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3 years ago

What is 9/10 minus 3/14?

Mathematics

2 answers:

vodka [1.7K]3 years ago

8 0

Hmmmm it should be 0.15 I think so

shtirl [24]3 years ago

4 0

Your answer would be -24/35.

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A system of equations is shown on the graph below. How many solutions does this system have?

Allisa [31]

Answer:

The system has no solution

Step-by-step explanation:

we know that

The solution of the system of two linear equations, is the intersection point both lines.

In this problem

The lines are parallel, the lines don't intersect

therefore

The system has no solution

Remember that, if two lines are parallel then their slope are equal

Verify that the slopes are the same

Blue line

take the points (0,2) and (-2,0)

$m=(0-2)/(-2-0)=1$

Red line

take the points (0,-3) and (3,0)

$m=(0+3)/(3-0)=1$

The slopes are equal

The lines are parallel

6 0

3 years ago

Evaluate(4):g(x) = 8x2 + 9x - 7

Rudiy27

Answer:

Answer:

157

let g(4) = x

3 0

3 years ago

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City health officials will conduct a two-sample t-test for a difference in means to investigate whether

Anvisha [2.4K]

Answer:

The calculated value t = 2.366 > 2.0301 at 0.05 level of significance

The null hypothesis is rejected

There is a difference between the means

Step-by-step explanation:

Step(i):-

Given that the first sample size 'n₁' = 22

Given that the mean of the first sample x₁⁻ = 120

Given that the standard deviation of the sample (s₁) = 20

Given that the mean of the second sample x₂⁻ = 100

Given that the standard deviation of the second sample (S₂) = 30

Step(ii):-

T-test statistic

$t = \frac{x^{-} _{1} -x^{-} _{2} }{\sqrt{S^{2} (\frac{1}{n_{1} }+\frac{1}{n_{2} } ) } }$

where

$S^{2} = \frac{n_{1} S_{1} ^{2}+n_{2} S_{2} ^{2} }{n_{1} +n_{2}-2 }$

$S^{2} = \frac{22( 20)^{2}+ 15(30) ^{2} }{22 +15-2 }$

S² = 637.1428

S = √637.1428 = 25.24168

The standard deviation of the sample 'S' = 25.24168

Step(iii):-

Null Hypothesis:H₀:

There is no difference between the means

Alternative Hypothesis:H₁:

There is a difference between the means

T-test statistic

$t = \frac{x^{-} _{1} -x^{-} _{2} }{\sqrt{S^{2} (\frac{1}{n_{1} }+\frac{1}{n_{2} } ) } }$

$t = \frac{ 120 -100 }{\sqrt{637.14 (\frac{1}{22 }+\frac{1}{15 } ) } }$

t = 2.366

Degrees of freedom

γ = n₁+n₂ -2 = 22+15-2 = 35

t₀.₀₅ = 2.0301

The calculated value t = 2.366 > 2.0301 at 0.05 level of significance

The null hypothesis is rejected

There is a difference between the means

3 0

3 years ago

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A line with a slope of 1/2 passes through the point (2, -1) what is the Equation of the line

Sonja [21]

Answer:

y=1/2x-2

Step-by-step explanation:

Hope this helps!

5 0

3 years ago

C=5/9(F - 32) concert 30C to Fahrenheit

Eva8 [605]

Answer:

132

Step-by-step explanation:

132

8 0

3 years ago

Read 2 more answers