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Darina [25.2K]
2 years ago
12

Help me with this question please

Mathematics
1 answer:
Rom4ik [11]2 years ago
5 0

Answer:

A

Step-by-step explanation:

5 is the hypotenuse, 3  is the opposite side, and 4 is the adjacent side. Thus, the cosine of A is adjacent/hypotenuse, hence 4/5.

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The age of professors at GHC is normally distributed with a mean of 42 years and a standard deviation of 5 years. A 30-year-old
FinnZ [79.3K]
30=42+5x\implies 5x=-12\implies x=-\dfrac{12}5=-2.4

So a 30 year old professor would be 2.4 standard deviations less than the mean.
3 0
3 years ago
1) Bianca ordered a shirt online that cost her $23 total.
zheka24 [161]

Answer:

Bianca is paying $22.08

Step-by-step explanation:

If the Shirt Cost 23$ in total, and the seller took 4% off the original price, Which means

4% of 23$ = 0.92 cents, now clearly it says "IT TOOK OFF"

So, now you subtract 0.92 from the original price, to find the new price.

Here the original price is 23$,

23$ - 0.92 = 22.08$, so that means...

Bianca ended up paying $22.08

3 0
2 years ago
Find the area of the shaded region.
Anvisha [2.4K]

Answer:

73.4 cm^2

Step-by-step explanation:

The equation is :

πr^2

Substitute the radius in:

π(5)^2

Solve:

Area of full circle = 25π

(Note : leave this answer in terms of 'pi' so it is easier to handle

Next, find the area of the sector

The equation for this is:

(angle/360) x πr^2

Substitute the values in:

(80/360) x π(5)^2

Solve :

Area of sector = (50/9)π

Now, find the area of the triangle:

1/2 absinC

Substitute the values in:

1/2(5)(5) x sin(80) = 12.31009691

Subtract this answer from the area of the sector

Answer = 5.14319607

Subtract this from the area of the whole circle

Answer = 73.39662073

To the nearest tenth, that would be 73.4 cm^2

Mark brainliest pls

3 0
3 years ago
Which expression is equivalent to (2−√−4)+(1+√−49)? <br> 3−5i <br> 3+5i <br> 8+0i <br> −2+0i
sergij07 [2.7K]

Answer:

3 + 5i.

Step-by-step explanation:

(2−√−4)+(1+√−49)

√−4 = 2i  and

√−49 = 7i.

So   (2−√−4 + (1+√−49

= ( 2 - 2i) + (1 + 7i)

=  3  + -2i + 7i

= 3 + 5i.

3 0
3 years ago
The perimeter of a rectangle is 510 cm. The ratio of the length to the width is 3:2. What are the dimensions of this rectangle?
Verizon [17]
The formula to find the perimeter of a rectangle is
p  = 2(l + w)
When we put in our givens to this formula:
510 = 2 \times (3x  + 2x)
Combine x values:
510 = 2 \times 5x
Simplify right side:
510 = 10x
Isolate x, by dividing both sides by 10:
51 = x
To find length:
l = 3x = 3 \times 51 = 153
For width:
w = 2x = 2 \times 51 = 102
To solidify our answers:
p = 2(l + w) = 2 \times (153 + 102) = 2 \times 255 = 510
So, our length is 153, our width is 102.
7 0
4 years ago
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