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Lina20 [59]
2 years ago
13

Please help! I don't really understand this :/

Mathematics
2 answers:
Airida [17]2 years ago
6 0

Answer:

The answer would be 19

Step-by-step explanation:

You plug in the x and y values, and it looks like this

2(4)^2/8+5(3)

Simplify

2(16)/8+15

32/8+15

4+15

--->19<---

SpyIntel [72]2 years ago
3 0

The answer is 19 (See picture below for explanation)

OR:

2 x (4^{2}) ÷ 8 + (5 x 3)

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Beth has 4900 feet of fencing available to enclose a rectangular field. one side of the field lies along a river, so only three
Illusion [34]

Perimeter (P) = 2L + x

            4900 = 2L + x   ⇒  4900 - x = 2L  ⇒ \frac{4900 - x}{2} = L

Area (A) = L · x

A  = (\frac{4900 - x}{2}) (x)

    = \frac{4900x - x^2}{2}

4 0
3 years ago
Find the value of x.
In-s [12.5K]

Answer:

49

Step-by-step explanation:

angle QPR and angle TPS are alternate angles and their measure is equal to each other:

3x + 1 = 148 subtract 1 from both sides

3x = 147 divide both sides by 3

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4 0
2 years ago
How many different four-digit numbers can be formed with the numbers 7; 4; 5; 1; 2; 9; and 8?
Masja [62]

Answer:

If I'm correct, the answer is 1296.

Step-by-step explanation:

6 x 6 x 6 x 6 = 1296

7 0
3 years ago
The amount A of the radioactive element radium in a sample decays at a rate proportional to the amount of radium present. Given
slavikrds [6]

Answer:

a) \frac{dm}{dt} = -k\cdot m, b) m(t) = m_{o}\cdot e^{-\frac{t}{\tau} }, c) m(t) = 10\cdot e^{-\frac{t}{2438.155} }, d) m(300) \approx 8.842\,g

Step-by-step explanation:

a) Let assume an initial mass m decaying at a constant rate k throughout time, the differential equation is:

\frac{dm}{dt} = -k\cdot m

b) The general solution is found after separating variables and integrating each sides:

m(t) = m_{o}\cdot e^{-\frac{t}{\tau} }

Where \tau is the time constant and k = \frac{1}{\tau}

c) The time constant is:

\tau = \frac{1690\,yr}{\ln 2}

\tau = 2438.155\,yr

The particular solution of the differential equation is:

m(t) = 10\cdot e^{-\frac{t}{2438.155} }

d) The amount of radium after 300 years is:

m(300) \approx 8.842\,g

4 0
3 years ago
Read 2 more answers
John's parents purchased their first home in the 1980s with a 30-year
slega [8]

Answer:

Option A,$ 1,832.91   is correct

Step-by-step explanation:

The monthly payment can be computed using the below pmt formula i excel shown below:

=pmt(rate,nper,-pv,fv)

rate is the monthly rate on the mortgage which is 17.5%/12=0.014583333

nper is the number of months of payment i.e 30*12=360

pv is the amount of the loan which is $125,000

fv is the total amount of repayment which is unknown

=pmt(0.014583333 ,360,-125000,0)=$ 1,832.91  

The correct option is A,$ 1,832.91  which is the amount of money they need to pay back on the mortgage for 360 months

7 0
2 years ago
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