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3 years ago

Help me answer these, please(-6)×(-2)= 4×(-8)=7×(-5)=

Mathematics

2 answers:

nikdorinn [45]3 years ago

8 0

2 negatives make a positive.
1 negative and 1 positive make a negative.
12
32
35

____ [38]3 years ago

7 0

Answer:

Step-by-step explanation:

-6x -2= 12

4x -8= -32

7x -5= -35

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A certain composite number has 4 factors and the sum of them is 96. Find the number(hint the number is divisible by 7). Just don

ankoles [38]

Answer:

$\huge\boxed{77}$

Step-by-step explanation:

The number can be divisible by 7.

The multiples of 7 are 7,14,21,28,35,42,49,56,63,70,77,84 and so on

<u>Finding the factors for all of the multiples of 7:</u>

7 => 1,7 [Not 4 factors]

14 => 1,2,7,14 [4 factors but Sum = 24]

21 => 1,3,7,21 [4 factors but Sum = 32]

28 => 1, 2, 4, 7, 14, 28 [Not 4]

35 => 1,5,7,35 [4 factors but Sum = 48]

42 => 1, 2, 3, 6, 7, 14, 21, 42 [Not 4]

49 => 1,7,49 [Not 4]

56 => 1, 2, 4, 7, 8, 14, 28, 56 [Not 4]

63 => 1, 3, 7, 9, 21, 63 [Not 4]

70 => 1, 2, 5, 7, 10, 14, 35, 70 [Not 4]

77 => 1, 7, 11, 77 [4 factors and Sum = 96]

7 0

3 years ago

Read 2 more answers

Please asap correct answer gets brainliest

weeeeeb [17]

Answer: 36 square units

Step-by-step explanation:

Divide the figure into 2 shapes: a rectangle and a triangle. Count the squares to find the dimensions of each figure. The rectangle has a width of 4 units and a length of 6 units. The triangle has a base of 6 units and a height of 4 units.

The formula for the area of a rectangle is length * width. The area of the rectangle is 4*6 = 24 square units.

The formula for the area of a triangle is (base * height)/2. The area of the triangle is (4*6)/2 = 24/2 = 12 square units.

Add the areas of both the rectangle and triangle. 24+12 = 36 square units.

8 0

2 years ago

Determine if the table is a function or not. Justify your answer using the terms "input" and "output".

agasfer [191]

Answer:

it not

Step-by-step explanation:

7 0

2 years ago

Nate walks 25 meters in 13.7 seconds. If he walks at this same rate, which of the following is closest to the distance he will w

ICE Princess25 [194]

Answer:

Step-by-step explanation:

4*60=240

240/13.7*25=437

6 0

3 years ago

A bond analyst is analyzing the interest rates for equivalent municipal bonds issued by Georgia and Ohio. A sample of 60 bonds i

slavikrds [6]

Answer:

Since our calculated value is outside than our critical value, $z_{calc}=-136.438$ , we have enough evidence to reject the null hypothesis at 5% of significance. So there is not nough evidence to conclude that mean for Ohio it's significantly different than the mean for Georgia.

Step-by-step explanation:

1) Data given and notation

$\bar X_{1}=3.6$ represent the mean for Georgia

$\bar X_{2}=4.15$ represent the mean for Ohio

$s_{1}=0.03$ represent the population standard deviation for Georgia

$\sigma_{2}=0.01$ represent the population standard deviation for Ohio

$n_{1}=60$ sample size for Georgia

$n_{2}=80$ sample size for Ohio

z would represent the statistic (variable of interest)

$p_v$ represent the p value

2) Concepts and formulas to use

We need to conduct a hypothesis in order to check if the means are different for both groups, the system of hypothesis would be:

H0: $\mu_{1} = \mu_{2}$

H1: $\mu_{1} \neq \mu_{2}$

If we analyze the size for the samples both are higher than 30, we can assume that the normal distribution is the correct disirbution for the statistic, so for this case is better apply a z test to compare means, and the statistic is given by:

$z=\frac{\bar X_{1}-\bar X_{2}}{\sqrt{\frac{\sigma^2_{1}}{n_{1}}+\frac{\sigma^2_{2}}{n_{2}}}}$ (1)

z-test: Is used to compare group means. Is one of the most common tests and is used to determine whether the means of two groups are equal to each other.

3) Calculate the statistic

We have all in order to replace in formula (1) like this:

$z=\frac{3.6-4.15}{\sqrt{\frac{0.03^2}{60}+\frac{0.01^2}{80}}}=-136.438$

4) Find the critical value

In order to find the critical value we need to take in count that we are conducting a two tailed test, so we are looking on the normal standard distribution a value that accumulates 0.025 of the area on the right and 0.975 of the area on the left. We can us excel or a table to find it, for example the code in Excel is:

"=NORM.INV(1-0.025,0,1)", and we got $z_{critical}=\pm 1.96$

5) Statistical decision

Since our calculated value is outside than our critical value, $z_{calc}=-136.438$ , and outside of (-1.96,1.96), we have enough evidence to reject the null hypothesis at 5% of significance. So there is not nough evidence to conclude that mean for Ohio it's significantly different than the mean for Georgia.

8 0

3 years ago

Help me answer these, please(-6)×(-2)= 4×(-8)=7×(-5)=​

Help me answer these, please(-6)×(-2)= 4×(-8)=7×(-5)=