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3 years ago

What is the answer for B in this?

Mathematics

2 answers:

BigorU [14]3 years ago

6 0

I think the answer would be 31°

netineya [11]3 years ago

4 0

what is the question of this problem

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Mark purchashed 3 giant jawbreakers at 75cents each.he also bought 1/4 pound of hot tamales.which sell for $2.76 a pound.he gave

aksik [14]

Answer: $0.44

Step-by-step explanation: a) (3 * 0.75) + ((1/4)*2.76) = 2.25 + 0.69 = 2.94

Pays with $5 - $2.94 = $2.06 Change

((1/2) * 3.24) = $1.62

Money left = 2.06 - 1.62 => $0.44

8 0

3 years ago

Integration of dx/3sin^2 -4

Scilla [17]

Answer:

= 1/2 tan^(-1)(2 cot(x)) + constant

Step-by-step explanation:

Take the integral:

integral1/(3 sin^2(x) - 4) dx

Multiply numerator and denominator of 1/(3 sin^2(x) - 4) by -sec^2(x):

= integral-(sec^2(x))/(4 sec^2(x) - 3 tan^2(x)) dx

Prepare to substitute u = tan(x). Rewrite -(sec^2(x))/(4 sec^2(x) - 3 tan^2(x)) using sec^2(x) = tan^2(x) + 1:

= integral-(sec^2(x))/(tan^2(x) + 4) dx

For the integrand -(sec^2(x))/(tan^2(x) + 4), substitute u = tan(x) and du = sec^2(x) dx:

= integral-1/(u^2 + 4) du

Factor out constants:

= - integral1/(u^2 + 4) du

Factor 4 from the denominator:

= - integral1/(4 (u^2/4 + 1)) du

Factor out constants:

= -1/4 integral1/(u^2/4 + 1) du

For the integrand 1/(u^2/4 + 1), substitute s = u/2 and ds = 1/2 du:

= -1/2 integral1/(s^2 + 1) ds

The integral of 1/(s^2 + 1) is tan^(-1)(s):

= -1/2 tan^(-1)(s) + constant

Substitute back for s = u/2:

= -1/2 tan^(-1)(u/2) + constant

Substitute back for u = tan(x):

= -1/2 tan^(-1)(tan(x)/2) + constant

Which is equivalent for restricted x values to:

Answer: = 1/2 tan^(-1)(2 cot(x)) + constant

6 0

3 years ago

5x+3-2x-2=4 solve for x

mrs_skeptik [129]

Answer:

x=1

Step-by-step explanation:

(5x+−2x)+(3+−2)=4

3x+1=4

3x=3

x=1

6 0

3 years ago

Read 2 more answers

Suppose the time to complete a 200-meter backstroke swim for female competitive swimmers is normally distributed with a mean μ =

Jobisdone [24]

In order to be given a scholarship, a swimmer must complete the 200-meter backstroke in no more than 144 seconds.

Explanation

Given that the time to complete a 200-meter backstroke swim for female competitive swimmers is normally distributed with a mean μ = 141 seconds and a standard deviation σ = 7 seconds

The fastest 6% of female swimmers in the nation are offered college scholarships. So, the probability will be 0.06

According to the normal distribution table, the z-score for probability of 0.06 is 0.5239

Now using z-score formula z= (x- μ)/σ , we will get...

$0.5239= \frac{x-141}{7}\\ \\ x-141= 3.6673\\ \\ x= 3.6673+141 \\ \\ x= 144.6673$

That means, $x < 144$ (in whole number)

So, in order to be given a scholarship, a swimmer must complete the 200-meter backstroke in no more than 144 seconds.

5 0

3 years ago

Find the least common denominator.

GarryVolchara [31]

Answer:

8×2=16

Step-by-step explanation:

4×2 simple 8 so the answer is 8×8 which is 64

4 0

3 years ago