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Sphinxa [80]
3 years ago
6

Investment of $100 at 15% simple interest for 15 years

Mathematics
1 answer:
timofeeve [1]3 years ago
8 0
The simple interest formula is A = P(1+rt) where P is your principal, or your initial amount, r is your rate and t is your time. Substitute the knowns into the equation.We get:

A = 100(1+0.15*15) = 325

Hopes this helps!
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I need to know the surface area of this shape
Sophie [7]
The area is the area of 2 pairs of congruent triangles and one rectangle. Use the formulas for the areas of these figures, then add results.

Front triangle area (A = (1/2)bh)
.. = (1/2)(16 m)*(25 m) = 200 m^2

Right side triangle
.. = (1/2)(22 m)*(24 m) = 264 m^2

Base (A = lw)
.. = (16 m)*(22 m) = 352 m^2

Total area
.. 2*front triangle +2*side triangle +base
.. = 2*200 m^2 +2*264 m^2 +352 m^2
.. = 1280 m^2
4 0
3 years ago
How? (2x^2 - 3x - 4)(x + 7)<br>​
lidiya [134]

Answer:

2 {x}^{3}  +  11{x}^{2}  - 25x - 28

Step-by-step explanation:

Using foil method, Multiply the first term

2 {x}^{2}  \times x = 2 {x}^{3}

Next, Multiply the Outer term in each parenthesis. (2x^2 and 7

2 {x}^{2}  \times 7 = 14 {x}^{2}

2 {x}^{2}  \times 7 = 14 {x}^{2}  \:  \:  \: 3x \times  - x =  - 3x

Then, Multiply the Inner Terms (-3x,-4,7) in each parenthesis

- 3x \times 7 =  - 21x

- 4 \times x =  - 4x

Then multiply the last term (-4 and 7).

- 4 \times 7 =  - 28

Combine it you have

2 {x}^{3}  + 14 {x}^{2}   - 3 {x}^{2}  - 21x - 4x - 28

which simplify to

2 {x}^{3}  + 11 {x}^{2}  - 25x - 28

3 0
3 years ago
The sum of the digits of a two − digit number is 11. The unit's digit is 7 less than the ten's digit. Find the number.
padilas [110]

Answer:

Number = 92

Step-by-step explanation:

Let the unit digit is x and that of tens digit is y.

ATQ,

x+y = 11 ....(1)

The unit's digit is 7 less than the ten's digit

x = y-7 ...(2)

Put the value of x from equation (2) in (1)

y-7+y = 11

2x-7 = 11

2x = 11+7

2x = 18

x = 9

Put the value of x in equation (1)

9+y = 11

y = 2

Hence, the number is 92.

3 0
3 years ago
125% of what total amount is 62?
shepuryov [24]

Answer: 49.6

Step-by-step explanation:

125% = 1.25

1.25 * 0.8 = 1

62 * 0.8 = 49.6

4 0
4 years ago
Read 2 more answers
In the diagram, what is the value of x?
Ghella [55]

Answer:

x = 162

Step-by-step explanation:

the sum of the interior angles of a quadrilateral = 360°

sum the interior angles of the quadrilateral and equate to 360

90 + 60 + x + 48 = 360 , that is

198 + x = 360 ( subtract 198 from both sides )

x = 162

5 0
3 years ago
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