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3 years ago

Another easy one, Brainliest + 35 Points. per the usual

Mathematics

2 answers:

Verdich [7]3 years ago

8 0

Answer: Its the 4th choice

Step-by-step explanation:

-12 + 8 = -4

borishaifa [10]3 years ago

3 0

Answer:

-12 +8

Step-by-step explanation:

-12/-3 = positive 4

5 - -9 = 5+9 = 14

(-2) ^ = -2 * -2 =4

-12 +8 = -4

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Find S in formula A=5²<br><br>Need help plss this for my exam

Kruka [31]

Answer:

S = √A

Step-by-step explanation:

Given that;

A = S²

Finding S implies making S the subject of the expression.

To do this;

A = S²

Take the square root of both sides of the expression;

√A = √S²

The square-root of the square of S = S;

S = √A

6 0

3 years ago

Solve by elimination and check. 2x+5y= 46. 3x-2y=12<br> Pls pls pls

kotykmax [81]

Answer:

x = 8, y = 6

Step-by-step explanation:

2x + 5y = 46______(1)

3x - 2y = 12_______(2)

(1) x 3 --> 6x + 15y = 138

(2) x 2 --> 6x -4y = 24

(1) - (2) --> 19y = 114

y = 6 sub into (2)

3x - (2 x 6) = 12

3x = 24

x = 8

<h2><em><u>Please mark as brainliest!!!</u></em></h2>

8 0

4 years ago

A lighthouse is located on a small island 2 km away from the nearest point P on a straight shoreline and its light makes four re

ddd [48]

Answer:

62.8 km per min

Step-by-step explanation:

Let the diagram of this situation is shown below,

In which $\theta$ is the angle made by light to the straight line joining the lighthouse and P,

∵ Light makes 4 revolutions per minute.

Also, 1 revolution = $2\pi$ radians

So, the change in angle with respect to t ( time ),

$\frac{d\theta}{dt}=8\pi\text{ radians per min}$

Let x be the distance of beam from P,

$\implies \tan \theta = \frac{x}{2}$

Differentiating with respect to x,

$\sec^2 \theta \frac{d\theta}{dt}=\frac{1}{2}\frac{dx}{dt}$

$(1+\tan^2 \theta) (8\pi) = \frac{1}{2}\frac{dx}{dt}$

$(1+\frac{x^2}{2^2})(8\pi) = \frac{1}{2}\frac{dx}{dt}$

If x = 1 km,

$(1+\frac{1}{4})8\pi =\frac{1}{2}\frac{dx}{dt}$

$\frac{5}{4}8\pi = \frac{1}{2}\frac{dx}{dt}$

$\implies \frac{dx}{dt}=\frac{80\pi}{4}= 20\pi\approx 62.8\text{ km per min}$

Hence, the beam of light moving along the shoreline with the speed of 62.8 km per min

7 0

4 years ago

You want to have $15,000 in 11 years. You will invest how much into an account that has an annual rate of 4.4% compounded daily?

igor_vitrenko [27]

Given:

Future Value = $15,000

time (t) = 11 years

rate (r) = 4.4% or 0.044

number of conversions per year (m) = 365

Find: Initial amount or the Principal

Solution:

Formula for Compound Interest is:

$F=P(1+\frac{r}{m})^{mt}$

From that, we can derive the formula for the Principal or the initial amount.

$P=\frac{F}{(1+\frac{r}{m})^{mt}}$

Let's plug in the given data above to the formula of the principal value.

$P=\frac{15,000}{(1+\frac{0.044}{365})^{365\times11}}$

Then, solve for P.

$P=\frac{15,000}{(1.000120548)^{4015}}=\frac{15,000}{1.622504316}\approx9,244.97$

Answer: You must invest $9, 244.97 to the account in order to get $15,000 after 11 years.

7 0

1 year ago

In which order should you look for assistance with college expenses?

lyudmila [28]

The correct answer should be Choice B.

Scholarships and merit aid are the best way to earn money to go to college. They don't have to be paid back. When it comes to loans, you should select federal before non-governmental because the interest rates are usually lower on federal loans.

8 0

4 years ago