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Lina20 [59]
2 years ago
12

IM TIMED HELP THANK YOU Dion predicted that he would sell 87 art prints. He actually sold 100 art prints. What are the values of

a and b in the table below? Percent Error Item Approximate value Exact value Error Absolute error Ratio Percent error Art prints 87 100 a b a = negative 13; b = negative 13 a = negative 13; b = 13 a = 13; b = negative 13 a = 13; b = 13
Mathematics
1 answer:
Feliz [49]2 years ago
3 0

Answer:

B

Explanation:

87/100 a b a = negative 13; b = negative 13 a = negative 13; b = 13 a = 13; b = negative 13 a = 13; b = 13 = x

Hope this helped!

-Toshino

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As soon as I knew cars purchased and driven away from the dealership it begins to lose its value or depreciate also bought a 199
balandron [24]

Answer:

  11.1%

Step-by-step explanation:

The percentage change in a value can be computed from ...

  %change = ((new value)/(old value) -1) × 100%

  = ((8500/9559) -1) × 100%

  = (0.8892 -1) × 100%

  = -11.08%

The value of the car decreased about 11.1% in the first year.

5 0
3 years ago
Factor both quadratic expressions. (x 4 + 5x 2 - 36)(2x 2 + 9x - 5) = 0
Sonbull [250]

So focusing on x^4 + 5x^2 - 36, we will be completing the square. Firstly, what two terms have a product of -36x^4 and a sum of 5x^2? That would be 9x^2 and -4x^2. Replace 5x^2 with 9x^2 - 4x^2: x^4+9x^2-4x^2-36

Next, factor x^4 + 9x^2 and -4x^2 - 36 separately. Make sure that they have the same quantity inside of the parentheses: x^2(x^2+9)-4(x^2+9)

Now you can rewrite this as (x^2-4)(x^2+9) , however this is not completely factored. With (x^2 - 4), we are using the difference of squares, which is a^2-b^2=(a+b)(a-b) . Applying that here, we have (x+2)(x-2)(x^2+9) . x^4 + 5x^2 - 36 is completely factored.

Next, focusing now on 2x^2 + 9x - 5, we will also be completing the square. What two terms have a product of -10x^2 and a sum of 9x? That would be 10x and -x. Replace 9x with 10x - x: 2x^2+10x-x-5

Next, factor 2x^2 + 10x and -x - 5 separately. Make sure that they have the same quantity on the inside: 2x(x+5)-1(x+5)

Now you can rewrite the equation as (2x-1)(x+5) . 2x^2 + 9x - 5 is completely factored.

<h3><u>Putting it all together, your factored expression is (x+2)(x-2)(x^2+9)(2x-1)(x+5)=0</u></h3>
5 0
3 years ago
A line has slope -1. It passes through the point Q(2, -n) and R(4, -3). What is the value of n?
dsp73

Answer:

i need this answer too

Step-by-step explanation:

lol

7 0
3 years ago
If x^2 = 30, what is the value of x?
Lapatulllka [165]
x= +\sqrt{30} ~or ~ -\sqrt{30}
I'm not sure why ± that sybol isn't working
all together you can write x=±\sqrt{30}

Ughh just ignore the "A" symbol .-.



5 0
3 years ago
the width of a rectangle is 8 feet and the diagnal length of the rectangle is 13 feet which measurement is closest to the length
____ [38]

Answer:

Well the whole answer is 10.246950 smth smth but I don’t have the multiple choices so your gonna have to round yourself

Step-by-step explanation:

Okay so you have a weigh of 8 and a diagonal of 13.

If you look, theres a triangle there. One side has 8 and the diagonal that was cut forms a 13. So we have a leg and a hypotnuse. To find the other leg (length) just follow the Pythagorean theroum and solve for b or a.

Pythagorean theroum: a^2+b^2=c^2

Now subsitute c for 13 since its the hypotnuse and a or b as 8 but only one.

In this case I’m substituting a for 8.

8^2+b^2=13^2

Solve the squares

64+b^2= 169

Isolate the b

b^2=105

Now square root 105

√105 will give the answer above on a normal calculator but if you have to round, I don’t know what place but you can round.

7 0
3 years ago
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