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Komok [63]
3 years ago
11

I don’t know how to solve the equation

Mathematics
1 answer:
Artemon [7]3 years ago
8 0
To solve this equation we have to factor.
We are looking for 2 numbers with a sum of -3, and multiplied they have to be -28. These numbers are -7 and 4.

So:
{x}^{2}  - 3x - 28 = 0
(x - 7)(x + 4) = 0
x - 7 = 0 \:  \:  \:  \: x + 4 = 0
x = 7 \:  \:  \:  \: x =  - 4

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A triangle can be formed with side lengths 4 in, 5 in, and 8 in. (5 points) False True
marin [14]

Answer:

True

Step-by-step explanation:

6 0
3 years ago
​A research report describing the results from a repeated-measures t test states that "t(22) = 1.71, p > .05."
Aleonysh [2.5K]

Answer:

b) Fail to reject the null hypothesis with a sample of n = 23 participants

Step-by-step explanation:

Hello!

A "Repeated-measures t-test" is also known as "paired sample t-test" In this type of test you have only one sample and you measure two variables of interest to each experimental unit. Since both study variables are measured in the same units they are said to be dependent.

The most common example of this type of test is the "before-after treatment" experiment.

The degrees of freedom of this experiment are

, so if the test was conducted under a t₂₂ distribution, then the sample size was n= 23 experimental units. Remember if you use the p-value approach, to make a decision over the null hypothesis you have to compare it to the level of significance following the decision rule:

If the p-value ≤ α, you reject the null hypothesis.

If the p-value > α, you do not reject the null hypothesis.

In this example is specified that the p-value is greater than the level of significance, then the decision is to not reject the null hypothesis.

With all this in consideration, the correct option is b)

U hope you have a SUPER day!

6 0
3 years ago
Plz help with this:)
4vir4ik [10]

9514 1404 393

Answer:

  -4

Step-by-step explanation:

The point (x, y) = (0, 0) is on the line, so it represents a <em>proportional relation</em>. Any ratio of y to x will be the slope. The choice that makes this computation easiest is ...

  x = 1, y = -4

  y/x = -4/1 = -4

The slope of the line is -4.

3 0
2 years ago
Simplify the ratio:<br><br> 15 m: 5000 mm : 10 m
kogti [31]

Answer:

3 : 1 : 2

Step-by-step explanation:

15 \:m  : 5000 \: mm \:   :  10 \: m \\  = 15 \:m  : 5 \: m \:   :  10 \: m \\  = 3  : 1 \:   :  2 \\

4 0
2 years ago
I need help with this question asap
Phoenix [80]

Answer:

The answer is 3

Step-by-step explanation:

The answer is 3 because the number with x is always the slope.

7 0
2 years ago
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