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stiv31 [10]
3 years ago
15

Which of the following values represents an index of refraction of an actual material? A. 1.25 B. 0 C. .25 D. .5

Mathematics
1 answer:
Artist 52 [7]3 years ago
6 0
A is your answer .-.
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Find the m∡B to the nearest tenth of a degree if cos B = 0.8926 and ∡B is an acute angle
mrs_skeptik [129]

Answer:

26.8°

Step-by-step explanation:

The cosine of an angle is the ratio of the adjacent side of the triangle in which the angle is formed to the hypotenuses side of the triangle. The cosine of the angle gives the ratio of these sides. However, the arc cosine of the ratio gives the angle measured in degrees.

If cos B = 0.8926

then arc cosine 0.8926  which may be expressed as cos-1 0.8926 will give the value of B.

B = cos-1 0.8926

= 26.8°

7 0
3 years ago
(100 points) find the cost of each treat
Anna71 [15]

Answer:

icecream = $2.99

donut = $1.19

creamcake = $4.99

Step-by-step explanation:

The picture shows $7.17 for 2 x ice-cream and 1 donut

We are given 3 cream cakes that total 14.97 we divide by 3 = 4.99

9.17- 4.99=4.18

=5.37-4.18 =1.19

we can then fill out the boxes.

1.19 +1.19 = 2.38 = 5.37-2.38= £2.99

2.99 +2.99 +1.19 = $7.17

We can see total first two rows = $12.56

2.99+2.99+2.99 +1.19 +1.19+1.19 = $12.56

4 0
3 years ago
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7x+2y=5 pls help me solve this problem?
hram777 [196]

Answer:

Slope: -7/2

y-intercept: 5/2

y = -7/2x + 5/2

Step-by-step explanation:

3 0
3 years ago
A car increases, then decreases, its speed. Which table could represent the speed of the car?
gulaghasi [49]

Answer:

B is ur answer

Step-by-step explanation:

6 0
2 years ago
Can someone simplify this equation and solve for x and y?<br> (2x-5)+(y-1)+x=169
goldenfox [79]

Answer:

Answer

2x+3y=14,2x−3y=2

Adding :

2x+3y=14

2x−3y=2

__________

4x=16

x=4

∴xy=4×2

=8

2×4+3y=14

8+3y=14

3y=6

y=2

Step-by-step explanation:

here you go

6 0
2 years ago
Read 2 more answers
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