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Rama09 [41]
3 years ago
12

PLEASE HELP ME IM GIVING 45 POINTS AND BRAINLEST!!!!! HELP NOW

Mathematics
1 answer:
kiruha [24]3 years ago
8 0
1st, 3rd,4th, and 5th should all be right
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What is the measure of arc AC?
8_murik_8 [283]

If Im not mistaken, the answer should be d because if you add all the degrees up, then you would get 222. And if you subtract 360 from 222 you get 138. I hope this helps. :)

7 0
3 years ago
Need help with this trigonometry word problem
kobusy [5.1K]

Answer:

86.6

Step-by-step explanation:



Here, AB represents height of the building, BC represents distance of the building from the point of observation.

In the right triangle ABC, the side which is opposite to the angle 60 degree is known as opposite side (AB), the side which is opposite to 90 degree is called hypotenuse side (AC) and the remaining side is called adjacent side (BC).

Now we need to find the length of the side AB.

tanθ  =  Opposite side/Adjacent side

tan 60°  =  AB/BC

√3  =  AB/50

√3 x 50  =  AB

AB  =  50√3

Approximate value of √3 is 1.732

AB  =  50 (1.732)

     AB  =  86.6 m

So, the height of the building is 86.6 m

4 0
3 years ago
Read 2 more answers
Diagram shows a section of a bridge between the points A and K. The length of line segment is 640 meters. ∆ABC, ∆CDF, and ∆FJK a
Marta_Voda [28]
AK = 640
Δ ABC and ΔFJK are similar. They are small triangles.
ΔCDF is the big triangle.

640 / 2 = 320 m= CF
AC & FK= 320/2 =  160 m each

2AC = CF = 2FK
2(160) = 320 = 2(160)

BG = 20 m

20/160 = x / 320
20*320 = 160x
6400 = 160x
6400/160 = x
40 = x

Area of CDF = (40 m * 320 m)/2 = 12,800 / 2= 6,400 m²
3 0
3 years ago
What is an ordered pair to the equation -6x+y=-4
balandron [24]

n

y

=

−

x

−

4

To find the x-intercept, substitute in

0

for

y

and solve for

x

.

0

=

−

x

−

4

Solve the equa

−

x

−

4

=

0

.

−

x

−

4

=

0

Add

4

to both sides of the equation.

−

x

=

4

Multiply each term in

x

=

−

4

by

−

1

x

=

−

4

To find the y-intercept, substitute in

0

for

x

and solve for

y

.

y

=

−

(

0

)

−

4

Simplify

−

(

0

)

−

4

.

Multiply

−

1

by

0

.

y

=

0

−

4

Subtract

4

from

0

.

y

=

−

4

These are the

x

and

y

intercepts of the equation

y

=

−

x

−

4

.

x-intercept:

(

−

4

,

0

)

y-intercept:

(

0

,

−

4

)

not too sure

6 0
3 years ago
In the beginning of the study, a randomly selected group of 121 students scored an average of 252 words per minute on the readin
Alborosie

Answer:

Since the sample size is larger than 30, the cognitive psychologist can assume that the sampling distribution of M will be approximately normal.

Step-by-step explanation:

We use the central limit theorem to solve this question.

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, a sample size larger than 30 can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}

So

Since the sample size is larger than 30, the cognitive psychologist can assume that the sampling distribution of M will be approximately normal.

5 0
3 years ago
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