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Pavel [41]
2 years ago
6

Pls help what is sideBC

Mathematics
1 answer:
ikadub [295]2 years ago
3 0

Answer:

Cosx=a/h

Cos70=y/5

5*cos70=1.71 =bc

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Please help.
kondor19780726 [428]

Answer :

27.5 minutes

Steps:

1) put into fraction form:

160/20 = 220/x

2) simplify:

160/20 = 8/1

3) cross multiply:

8 • x = 8x

220 • 1 = 220

4) divide on both sides:

8/8 = crosses out

220/8 = 27.5

6 0
3 years ago
Jared can ran 4 miles in 1/2 hour. What is his average speed in miles per hour? (how many miles can he run in 1 hour)
evablogger [386]

Answer: His average speed is 8 miles an hour

Step-by-step explanation: First, two halves make a whole, so we simply multiply how many miles he ran in half an hour by 2!

4 x 2 = 8

Hope this helps :)

4 0
3 years ago
Find the value of x, rounded to the nearest tenth. <br> Answer options: 4.2, 3.7, 4.4, 8.9
ivanzaharov [21]

Answer:

= 8.9 units

Step-by-step explanation:

When a chord intersects with a tangent outside a circle then we use the relationship;

X ² = AO × BO, Where A and are the points of intersection of the chord an the circle, while O is the point of intersection between the chord and the tangent.

Therefore;

x² = 4 × 20 or 8 × 10

x² = 80

x = √80

= 8.944

 ≈ 8.9

4 0
3 years ago
Thirty three different video games showing violence were observed. The duration times of violence ​(in seconds) were recorded. W
AlladinOne [14]

Answer:

The "df" stands for "degrees of freedom", and represents the number of independent observations in a set of data.

Its value in this case is df=32.

Step-by-step explanation:

The sample is of size n=33.

As we do not know the population's standard deviation, we use as estimate the sample's standard deviation. Because of this, we use the t-statistic in place of the z-value.

The "df" stands for "degrees of freedom", and represents the number of independent observations in a set of data (the data in this case is the sample of 33 video games).

In one-sample tests, the degrees of freedom are calculated as:

df=N-1=33-1=32  

6 0
3 years ago
Write the equation of the line that is perpendicular to y=1/2x+3 and has a y-intercept of -4
ANTONII [103]

Answer:

y=-2x-4

Step-by-step explanation:

When an equation is perpendicular, then it is the equation's inverse. The inverse of 1/2 is -2

The y-intercept is b in y=mx+b. In this equation, b=-4

4 0
3 years ago
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