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2 years ago

What is the value of 2(x+y)² when X=3 and Y=4 ?

Mathematics

2 answers:

valina [46]2 years ago

8 0

Answer:

Step-by-step explanation:

Given

2(x + y)² ← substitute x = 3 and y = 4 into the expression

= 2(3 + 4)²

= 2(7)²

= 2 × 49

= 98

otez555 [7]2 years ago

3 0

Answer:

Step-by-step explanation:

Step 1: Define

2(x + y)²

x = 3

y = 4

Step 2: Substitute and Evaluate

2(3 + 4)²

2(7)²

2(49)

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What is the exact value of cos (67.5° )?

Brilliant_brown [7]

Answer:

0.38268343

Step-by-step explanation:

cos( 67.5 )

Rewrite

67.5

as an angle where the values of the six trigonometric functions are known divided by 2 . cos ( 135\ 2)

Apply the cosine half-angle identity.

√

cos

(

135

)

Change the

because cosine is positive in the first quadrant.

√

cos

(

135

)

Simplify

√

cos

(

135

)

√

−

√

The result can be shown in multiple forms.

Exact Form:

√

−

√

Decimal Form:

0.38268343

…

6 0

3 years ago

Find x...............................

notsponge [240]

Answer:

sqrt(2) =x

Step-by-step explanation:

Since this is a right triangle, we can use trig functions

sin theta = opp/ hyp

sin 45 = x/2

2 sin 45 =x

2 ( sqrt(2)/2) =x

sqrt(2) =x

6 0

2 years ago

Read 2 more answers

HELP PLEASE!!!!!!!!!!!!!!!!!!!!!!

AleksAgata [21]

Your answer would be b.2

6 0

2 years ago

Read 2 more answers

What is the equation of the inverse y = x^2 + 4?

Tasya [4]

The correct answer is b

4 0

2 years ago

The number of days that homes stay on the market before they sell in Houston is bell-shaped with a mean equal to 56 days. Furthe

antoniya [11.8K]

Answer:

D. 8

Step-by-step explanation:

We have been given that the number of days that homes stay on the market before they sell in Houston is bell-shaped with a mean equal to 56 days. Further, 95 percent of all homes are on the market between 40 and 72 days.

As per empirical rule 95% of the data on bell curve lies between 2 standard deviations of mean.

So we can set an equation as:

$72-56=2\sigma$ or

$40-56=-2\sigma$

$16=2\sigma$

$\frac{16}{2}=\frac{2\sigma}{2}$

$8=\sigma$

$40-56=-2\sigma$

$-16=-2\sigma$

$\frac{-16}{-2}=\frac{-2\sigma}{-2}$

$8=\sigma$

Therefore, the standard deviation for our given data is 8 and option D is the correct choice.

6 0

2 years ago