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pickupchik [31]
3 years ago
11

NEED HELP!!!!!! Please thank you

Mathematics
1 answer:
chubhunter [2.5K]3 years ago
7 0

Answer:

1. 39 km/hr

2. $235

3. 16

4. 7m+3 inches

Step-by-step explanation:

1. Original speed of car: x km

x+21=60

x=39

original speed: 39 km/hr

2. Amount that the freshman class raised: x

2x+85=555

2x=555-85=470

x=235

Amount that the freshman class raised: $235

3. Number: x

5x-9=71

5x=71+9=80

x=16

The number: 16

4.

3m+5+4m-2

= 3m+4m+5-2

=7m+3 inches

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Lars is planning to purchase a home. He has been approved for a $420,000, 20-year mortgage with an APR of 5.125%.
Alenkasestr [34]

Answer:

Wow - you are asking a LOT of questions.  The Monthly Payment Formula is really tricky so I'll solve that for you.  

The time of the loan = 20 years * 12 = 240 months

We have to convert the annual rate to a monthly rate and that is done by:

monthly rate = 5.125 / 1,200 = 0.00427083333333333

Monthly pmt = 0.00427083333333333 + [0.00427083333333333 / (1.00427083333333333^240) -1 ] * 420,000

Monthly pmt = 0.00427083333333333 + [0.00427083333333333 / 2.7810190076 -1] * 420,000

Monthly pmt = (0.00427083333333333 +0.0023979718) * 420,000

Monthly pmt = 2,800.90

A calculator to double check is here: https://www.1728.org/calcloan.htm

Step-by-step explanation:

6 0
3 years ago
Id really appreciate it if someone helped me , i’ll give you brainliest
Vadim26 [7]

Answer: it’s the same 110 degrees

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Can someone help me with this
Elanso [62]

Answer:

1,256 dm^2 and 400π dm^2

Step-by-step explanation:

The circumference is equal to 2pi times the radius. So 40pi=2pi times the radius so the radius is 20. The area of a circle is pi times the radius squared or 400pi and if using 3.14 for pi this would be 1,256 dm^2

6 0
2 years ago
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Find the average value of f over region
SVETLANKA909090 [29]
D is a right triangle with base length 1 and height 8, so the area of D is \dfrac12(1)(8)=4.

The average value of f(x,y) over D is given by the ratio

\dfrac{\displaystyle\iint_Df(x,y)\,\mathrm dA}{\displaystyle\iint_D\mathrm dA}

The denominator is just the area of D, which we already know. The average value is then simplified to

\displaystyle\frac74\iint_Dxy\,\mathrm dA

In the x,y-plane, we can describe the region D as all points (x,y) that lie between the lines y=0 and y=8x (the lines which coincide with the triangle's base and hypotenuse, respectively), taking 0\le x\le1. So, the integral is given by, and evaluates to,

\displaystyle\frac74\int_{x=0}^{x=1}\int_{y=0}^{y=8x}xy\,\mathrm dy\,\mathrm dx=\frac78\int_{x=0}^{x=1}xy^2\bigg|_{y=0}^{y=8x}\,\mathrm dx
=\displaystyle56\int_{x=0}^{x=1}x^3\,\mathrm dx
=14x^4\bigg|_{x=0}^{x=1}
=14
3 0
3 years ago
Can you guys help me asap
stepladder [879]
The answer should be D.
7 0
3 years ago
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