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enot [183]
4 years ago
12

Andreas invested $1000 in a savings account. After 4 years, the account had earned a total of $112 simple interest without any a

dditional deposits. What was his interest rate?
Mathematics
1 answer:
Westkost [7]4 years ago
8 0
The formula to figure out Simple Interest is: I = PRT. Since this question is asking you to find the interest rate, you just have to rearrange the equation to make R the subject.

> R = I/PT
>> R = 112/1000 x 4 = 0.028 x 100 (find percentage) = 2.8%
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2(w-1)+8=6(2w-4) please help w=?
sergejj [24]

Answer:

W = 3

Step-by-step explanation:

2(W - 1) + 8 = 6(2w - 4)

2w - 2 + 8 = 12w - 24

2w + 6 = 12w - 24

6 = 10w - 24

30 = 10w

3 = W

Hope this helps. Pls give brainliest.

5 0
3 years ago
5. Given that a + b = 8 and ab = 15, find the value of (a+b)² and a² + b²​
Maksim231197 [3]

Answer:

64 and 34

Step-by-step explanation:

Given

a + b = 8 ( square both sides )

(a + b)² = 8² = 64

------------------------------------------------

(a + b)² = 64 ← expand left side

a² + b² + 2ab = 64 ← substitute ab = 15

a² + b² + 2(15) = 64

a² + b² + 30 = 64 ( subtract 30 from both sides )

a² + b² = 34

5 0
3 years ago
What is the perimeter of the shape below, given a = 5.66, b = 13.75, c = 6.76, d = 4.59
Marina86 [1]

Answer:

61.52

Step-by-step explanation:

5.66+ 13.75 + 6.76 + 4.59 + 5.66+ 6.76 + 13.75 +4.59

7 0
3 years ago
Read 2 more answers
Please help me with this please and ty
aleksandr82 [10.1K]
Its way too small i cant see the question.
5 0
3 years ago
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Which features describe the graph of y^2/96^2 - x^2/40^2 =1? Check all that apply.
goldenfox [79]
The given equation is 
\frac{y^{2}}{96^{2}} - \frac{x^{2}}{40^{2}} =1

From the given equation,
a = 40
b = 96
(h,k) = (0,0), the center

The vertices are at (0,96) and at (0, -96).
The curves open upward and downward.

c² = a² + b² = 40² + 96² = 10816
c = 104
Therefore the foci are at (0, -104) and (0, 104).

Check the given answers:
1. a focus at (104, 0) is INCORRECT
2. a focus at (0, -96) is INCORRECT
3. a vertex at (-40, 0) is INCORRECT
4. a vertex at (0, 96) is CORRECT
5. the center at (0, 0) is CORRECT

8 0
3 years ago
Read 2 more answers
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