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HACTEHA [7]
3 years ago
9

HELP ASAP

Mathematics
1 answer:
Gnom [1K]3 years ago
4 0

Answer:

(-1--2)/(4-2) = 1/2

y+1 = (1/2)(x-4) from plugging in (4,-1) but you could have used either point

2y+2 = x-4

2y = x-6

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What is the inverse of
Paladinen [302]

Answer:

A^{-1} = \frac{1}{66} \left[\begin{array}{cc}-2&-5\\6&-18\end{array}\right]

Step-by-step explanation:

Given

A = \left[\begin{array}{cc}-18&5\\-6&-2\end{array}\right]

Required

Determine the inverse

A matric is of the form:

A = \left[\begin{array}{cc}a&b\\c&d\end{array}\right]

First, we need to calculate the determinant (D)

D = a * d - b * c

By comparison, we have:

D = (-18 * -2) - (5 * -6)

D = (36) - (-30)

D = 36 +30

D = 66

The inverse is then represented as:

A^{-1} = \frac{1}{D} \left[\begin{array}{cc}d&-b\\-c&a\end{array}\right]

This gives:

A^{-1} = \frac{1}{66} \left[\begin{array}{cc}-2&-5\\6&-18\end{array}\right]

4 0
2 years ago
When 440 junior college students were surveyed, 200 said they have a passport. Construct a 95% confidence interval for the propo
nekit [7.7K]
Sample proportion: 190/425 = 0.45
ME = 1.96*sqrt[0.45*0.55/425] = 0.047
-----
95% CI: 0.45-0.047 < p < 0.45+0.047
7 0
3 years ago
Im being timed so please be quick thank you !!
ivanzaharov [21]

Answer:

#3

Step-by-step explanation:

The y-intercept (the point where the line intersects with the y-axis) is -2, and the slope is 2/3 (two units up every three units to the right).

3 0
2 years ago
Read 2 more answers
Analyze the diagram below and complete the instructions that follow.
ozzi
According to the image:
the right hexagonal pyramid surface area is given by the following formula:

S = 3√3 / 2) a² + 3a √h²+3a²/4
a = the base edge
h = the height of the pyramid

looking at the image  a =6m,  h =21m - 7m= 14m

so the surface area is S = 3√3 / 2) 6² + 3*6√14²+3*6²/4 =93.53+ 14.93=108.46 m²

for the another one
the figure is a prism hexagonal
its surface area is 
SA= 6ah +3√3 a²
a= base edge, h =height
in our case a =6m and h = 7m
so SA= 6*6*7 + 3√3 * 6²= 252 + 187 = 439 m²

finally, the surface area of the complete image is 
ST= S + SA = 108.46 m² + 439 m² = 547.52 m²
it is so approximate
 to <span>B. 615.53 m2
look at the image</span>

6 0
3 years ago
Hi so I have this problem that I’m stuck on...math is very hard and I need your help
irakobra [83]
The answer to your problem is 10m minus 20n or 10m-20n for short.
3 0
3 years ago
Read 2 more answers
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