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3 years ago

I need answer how to do number 3

Mathematics

2 answers:

mina [271]3 years ago

4 0

Ok so If 2 of those shapes make one then to find out how many it would need to make 4 you can do this 1 =2 shapes 2 = 4 shapes 3 = 6 shapes 4 = 8 shapes or in this case 2 * 4 = 8 so your answer is 8

Olegator [25]3 years ago

3 0

You know that you need two already to make one hexagon. So, if you multiply, or add two four times, 2+2+2+2, you would get eight.

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Help help help help help

wariber [46]

Answer:

Step-by-step explanation:

1) (-6 , 2) ; (3 , -5)

Slope = $\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$

$= \frac{-5-2}{3-[-6]}\\\\= \frac{-5-2}{3+6}\\\\= \frac{-7}{9}\\$

m = -7/9 ; (-6 , 2)

y - y₁ = m(x -x₁)

y - 2 = (-7/9)(x - [-6])

$y - 2 = \frac{-7}{9}(x + 6)\\\\y -2 = \frac{-7}{9}x + \frac{-7}{9}*6\\\\y - 2 = \frac{-7}{9}x - \frac{7*2}{3}\\\\ y = \frac{-7}{9}x - \frac{14}{3} + 2\\\\y = \frac{-7}{9}x -\frac{14}{3} + \frac{2*3}{1*3}\\\\y = \frac{-7}{9}x - \frac{14}{3} + \frac{6}{3}\\\\y = \frac{-7}{9}x - \frac{8}{3}$

2) (3 , -4) ; m= 3

$y - y_{1} = m(x - x_{1}$ )

y - [-4] = 3(x - 3)

y + 4 = 3x - 3*3

y + 4 = 3x - 9

y = 3x - 9 - 4

Ans: y = 3x - 13

3) m = 2 ; y-intercept (b) = 3/2

y = mx + b

Ans: y = 2x + (3/2)

4) (-1, 3 ) ; (2 , 0)

Slope = $\frac{0 - 3}{2-[-1]}$

$= \frac{-3}{2+1}\\\\= \frac{-3}{3}\\\\= 1$

m = 1; ( -1 , 3)

y - 3 = 1(x -[-1])

y - 3 = 1(x + 1)

y - 3 = x + 1

y = x + 1 + 3

Ans: y = x + 4

5)(2, 1) ;m = -3

y - 1 = (-3)(x - 2)

y - 1 = -3x + 6

y = -3x + 6 +1

Ans: y = -3x + 7

5 0

3 years ago

Read 2 more answers

How do i solve this? can i have an explanation too if possible?

djverab [1.8K]

Answer:

x = 120

Step-by-step explanation:

First you want to get the equation into the form cosx = a

2 cos $\frac{x}{2}$ =1

Divide both sides by two to get it into the form.

cos $\frac{x}{2}$ = $\frac{1}{2}$

Now, on your calculator, use the inverse of cos, to solve for $\frac{x}{2}$ .

$\frac{x}{2}$ = $cos^{-1}$ ( $\frac{1}{2}$ )

$\frac{x}{2}$ = 60

Now you want to find x, so multiply both sides by 2.

x = 60 * 2 = 120

x can have many solutions; however, I have only given you one.

5 0

3 years ago

PLEASE HELP ME!!!!!!!

Anastasy [175]

Answer:

:))

Step-by-step explanation:

Collect like terms, keeping the integer rules in mind

5. 5a + 9b - 3a + 2b + 4a

5a + 4a - 3a + 9b + 2b (REARRANGE, if you find it to help)

6a + 11b

6. 7m + 3n - 8m + 2n + 10m

7m + 10m - 8m + 3n + 2n

9m + 5n

10. 10m²n + 5mn + 9m²n - 2mn

10m²n + 9m²n + 5mn - 2mn

19m²n + 3mn

Try to do the rest on your own :)

7 0

3 years ago

(1 point) The systolic blood pressure (given in millimeters) of males has an approximately normal distribution with a mean of 12

garik1379 [7]

Answer:

a) $Z = -2.7$

b) $Z = 2.3$

c) Kyle's systolic blood pressure is 1.75 standard deviations above the average systolic blood pressure for men.

d) $X = 144.5$

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 127, \sigma = 10$

(a) 100 millimeters z-score =

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{100 - 127}{10}$

$Z = -2.7$

(b) 150 millimeters z-score =

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{150 - 127}{10}$

$Z = 2.3$

(c) Kyle's doctor told him that the z-score for his systolic blood pressure is 1.75. Which of the following is the best interpretation of his score?

1.75 standard deviations above the mean systolic blood pressure of males.

The problem does not talk about age.

So the answer is:

Kyle's systolic blood pressure is 1.75 standard deviations above the average systolic blood pressure for men.

d) Calculate Kyle's blood pressure

This is X when Z = 1.75. So

$Z = \frac{X - \mu}{\sigma}$

$1.75 = \frac{X - 127}{10}$