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REY [17]
3 years ago
15

PLEASE HELP Are Matrices A and B inverses?

Mathematics
1 answer:
makvit [3.9K]3 years ago
7 0
Yes, they are.
Inverse of matrices:
plug matrix into calculator
second matrix
edit
second quit
second matrix
press A
press x^ -1
enter

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Factorise fully 8x^2+6x
alexgriva [62]

Answer:

2x(4x + 3)

Step-by-step explanation:

8x^2 + 6

So the common terms that can be taken out are x and 2

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6 0
2 years ago
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A school has 1,000 students on Wednesday, 300 students went on a field trip. What percent of students did not go on the field tr
iris [78.8K]

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%70

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7 0
3 years ago
While visiting a​ memorial, a person approximated the angle of elevation to the top of the memorial to be 35º. After walking 255
Alenkasestr [34]

Draw a diagram to illustrate the problem as shown in the figure below.

Let h the height of the hill. =

At position A, the angle of elevation is 40°, and the horizontal distance to the foot of the hill is x.

By definition,

tan(40°) = h/x h = x tan40 = 0.8391x

(1)

At position B, Joe is (x - 450) ft from the foot of the hill. His angle of elevation is

40 + 18 = 58°.

By definition, tan(58°) = h/(x - 450)

h = (x - 450) tan(58°) = 1.6003(x-450)

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Equate (1) and (2).

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x = 946.0523

From (1), obtain

h = 0.8391*946.0523 = 793.8 ft

Answer: The height of the hill is approximately 794 ft (nearest integer)

6 0
2 years ago
Which shape has four congruent sides and two sets of parallel sides?
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Harman [31]

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3 years ago
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