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2 years ago

Help ASAP! Correct answer will be marked BRAINLIEST!!!

Mathematics

2 answers:

Alika [10]2 years ago

8 0

Answer:

11 4/5 :P....

Step-by-step explanation:2*2 1/2 +2*3 2/5

Nataly_w [17]2 years ago

5 0

Answer:

not telling u the answer but first multiply 2 x 2 1/2 (4 1/2) then add that to 6 2/5

Step-by-step explanation:

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I don't need you to work it out, just theorem(s) i need to reach the answer :)

VikaD [51]

Not sure why such an old question is showing up on my feed...

Anyway, let $x=\tan^{-1}\dfrac43$ and $y=\sin^{-1}\dfrac35$ . Then we want to find the exact value of $\cos(x-y)$ .

Use the angle difference identity:

$\cos(x-y)=\cos x\cos y+\sin x\sin y$

and right away we find $\sin y=\dfrac35$ . By the Pythagorean theorem, we also find $\cos y=\dfrac45$ . (Actually, this could potentially be negative, but let's assume all angles are in the first quadrant for convenience.)

Meanwhile, if $\tan x=\dfrac43$ , then (by Pythagorean theorem) $\sec x=\dfrac53$ , so $\cos x=\dfrac35$ . And from this, $\sin x=\dfrac45$ .

So,

$\cos\left(\tan^{-1}\dfrac43-\sin^{-1}\dfrac35\right)=\dfrac35\cdot\dfrac45+\dfrac45\cdot\dfrac35=\dfrac{24}{25}$

7 0

3 years ago

A class trip was 234 miles away from the school. If the bus driver drove at a constant speed of 70 mph, about how long did the t

galina1969 [7]

C. 3 hours 34 minutes

Divide:
234 ÷ 70 = 3.34

Your answer is C

♥ Hope I helped ♥

7 0

2 years ago

Read 2 more answers

I WILL MARK BRAINLIEST! :3 Find the total cost. Purchase price= $2615 Tax rate= 3%

balu736 [363]

Answer:

78.45

Step-by-step explanation:

u know 3 as decimal is 0.03 so u multiply 2,615*0.03 which is 78.45

8 0

2 years ago

HELPP PLEASEEEEEEEEEEEEEEEEEEEEEE The sum of 6 and 12 divided by 9.

allsm [11]

6 + 12 = 18
18/9 = 2

The answer is 2

Hope this helps

3 0

2 years ago

Read 2 more answers

Please help me with this.A rectangular field is

Karolina [17]

First, let's get the perimeter of the rectangle:
$P=2W+2L$
$P=130m+210m$
$P=340m$
Then, let's get the area of the bigger one:
$A=WL$
$A=65m*105m$
$A=6825m^2$

Then let's try using a rectangle with a smaller ratio:
$P=100m+240m$
$P=340m$
Then:
$A=50m*120m$
$A=6000m^2$

If you used a square:
$P=170+170$
$P=340$
$A=WL$
$A=85^2$
$A=7225$

There you have it. A rectangle with a smaller area with the same perimeter.
What does it show? The smaller the difference you get from width and length, the larger the area is.

5 0

2 years ago

Read 2 more answers