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3 years ago

Which inequality is equivalent to -3x < -12?

Mathematics

1 answer:

astraxan [27]3 years ago

8 0

Answer:

Simplified, this will be equal to x>4.

Step-by-step explanation:

I assume you need it simplified, since not much information was provided. Here is how you would do that:

-3x<-12

Divide by -3

Swap inequality sign since you are dividing by a negative

x>4

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Need help on this question

bulgar [2K]

Solving using quadratic formula: x=4, -7/3

Factor by grouping: (3x+7)(x-4)

7 0

3 years ago

Read 2 more answers

Can someone give the answer to question 2

Natasha_Volkova [10]

Step-by-step explanation:

try doing a2+b2=c2 it will help

3 0

3 years ago

Select all equivelent to the following: 9y+4y+9y<br> 1. 22y<br> 2. 13y-9y<br> 3. 9y+13y<br> 4. 22+y

igor_vitrenko [27]

Answer: 22y and 9y+13y

Step-by-step explanation: Just using basic math, ofc

1st Answer: 9y + 9y = 18y .

18y + 4y = 22y

2nd Answer: 9y + 10y = 19y .

19y + 3y = 22y

3 0

2 years ago

For an independent t-test, if the mean of group 1=10, mean of group 2=12, ss1 =5, ss2=8, there are 6 individuals per group. what

eimsori [14]

The value of t obtained is 4.76

Given,

Mean of group 1, $M_{1}$ = 10

Mean of group 2, $M_{2}$ = 12

$SS_{1}$ = 5

$SS_{2}$ = 8

Number of individuals per group, n = 6

The degrees of freedom are calculated as:

$df = (n_{1} -1)+(n_{2} -1)$ = ( 8-1) + (8-1) = 7 + 7 = 14

The difference between sample means $M_{d}$ is:

$M_{d}$ = $M_{1} -M_{2}$ = 10 - 12 = 2

Here n is equal for both groups which is = 8

Now,

The standard deviation of sample 1 :

$s_{1} =\sqrt{\frac{SS_{1} }{n_{1} -1} } = \sqrt{\frac{5}{8-1} } = \sqrt{\frac{5}{7} } = 0.85$

The standard deviation of sample 2 :

$s_{2}= \sqrt{\frac{SS_{2} }{n_{2}-1 } } = \sqrt{\frac{8}{8-1} } = \sqrt{\frac{8}{7} } = 1.07$

Now, we have to calculate the standard error for the difference of the means.

MSE = $\frac{(n_{1}-1)s^{2} _{1}+(n_{2}-1)s^{2} _{2} }{(n_{1}-1)+(n_{2}-1) }$

= $\frac{(8-1)(0.85^{2})+(8-1)(1.07^{2}) }{(8-1)+(8-1)}$

= $\frac{10.1318}{14}$

MSE = 0.7237

Then, the standard error can be calculated as:

$s_{M_{d} } = \sqrt{\frac{2MSE}{n} } = \sqrt{\frac{2 * 0.7237}{8} } = 0.42$

Now we can calculate t :

$t=\frac{M_{d} }{s_{M_{d} } } = \frac{2}{0.42} = 4.76$

Learn more about standard deviation here : brainly.com/question/16403666

#SPJ4

7 0

2 years ago

Determine if the following system of equations has no solutions, infinitely many

Lesechka [4]

Step-by-step explanation:

5x+6=1

5x=1-6

5x=-5

x=-1 in -5x-8y=2

-5(-1)-8y=2

5-8y=2

-8y =2-5

-8y=-3

7 0

3 years ago