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guapka [62]
2 years ago
15

Pls help, 'll mark the brainliest. SOS

Mathematics
1 answer:
miv72 [106K]2 years ago
5 0

Answer:

Which one do you need the answer for

Step-by-step explanation:

You might be interested in
Barbara deposited $300 in the bank. If the bank pays her simple interest at the rate of 4 percent per year, how much money will
grigory [225]

Answer:

309

Step-by-step explanation:

The formula for simple interest is

A = P(1 + rt)

where A is the amount of money in the account

P is the principal invested

r is the interest rate in decimal form

t is the time invested in years

We know

P = 300

r = 4% = .04

t = 9 months = 9 months * 1 year/12 months = .75 year

Substituting into the equation

A = 300(1 + .04*.75)

  =300 (1+.03)

  =300(1.03)

   = 309

4 0
3 years ago
The perimeter of a parallelogram is 72 meters. The width of the parallelogram is 4 meters less than its length. Find the length
mafiozo [28]
Perimeter of a parallelogram = 2(l + w). But w = l - 4
Therefore, 72 = 2(l + l - 4) = 2(2l - 4) = 4l - 8
4l = 72 + 8 = 80
l = 80/4 = 20
w = 20 - 4 = 16

Therefore, length = 20 meters and width = 16 meters
7 0
3 years ago
Find the condition of the expression:√3-2x-x^2
Alex73 [517]

Answer:

-1 <= x <= 1

Step-by-step explanation:

√((1-2x+x^2)+2-2x^2)

= √((1-x)^2 + 2*(1-x)(1+x) )

điều kiện là 1 - x > =0 và 1+x >=0

giải 2 bất phương trình trên ta thu đc kết ququả

7 0
1 year ago
Liam is setting up folding chairs for a meeting. If he arranges the chairs in 8 rows of the same length, he has 3 chairs left ov
Debora [2.8K]

Answer:

150 chairs

Step-by-step explanation:

8 0
2 years ago
The average high temperature during the hottest month in Beijing, China, is 72°F. The average high temperature during the coldes
Angelina_Jolie [31]

Answer:

- September

Step-by-step explanation:

The temperature in Beijing, in m months after January, is given by the following equation:

T(m) = 27\cos{((\frac{\pi}{6})(m-6))} + 45

In which m is the number of months after January.

During which month in the year would the temperature reach 55°F?

We have to find m for which: T(m) = 55. So

T(m) = 27\cos{((\frac{\pi}{6})(m-6))} + 45

55 = 27\cos{((\frac{\pi}{6})(m-6))} + 45

27\cos{((\frac{\pi}{6})(m-6))} = 10

\cos{((\frac{\pi}{6})(m-6))} = \frac{10}{27}

Now, we apply the inverse cosine, on both sides of the equation, to find the value of m.

\cos^{-1}{\cos{(\frac{\pi}{6})(m-6)}} = \cos^{-1}{\frac{10}{27}}

Now, with the help of a calculator, in radians:

\frac{\pi}{6}(m-6) = 1.19

\pi m - 6\pi = 6*1.19

\pi m = 6*1.19 + 6 \pi

m = \frac{6*1.19 + 6 \pi}{\pi}

m = 8.27

8.27 months after January, since 8.27 + 1 = 9.28, it happens during the month of September.

5 0
3 years ago
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