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valentina_108 [34]
3 years ago
5

Ruiz needs to buy a countertop for a kitchen. He calculated the area to be 16 square feet. The actual area is 15.4 square feet.

What is Ruiz's percentage error?
A.0.6%
B.3.75%
C.3.9%
D.6%
Mathematics
2 answers:
igomit [66]3 years ago
3 0
Percentage error =\frac{error}{actual measurement}  \times 100
Here error = 16 - 15.4 = 0.6
Therefore, percentage error =\frac{0.6}{15.4}  \times 100=0.039 \times 100
=3.9%
azamat3 years ago
3 0

Answer:

3.9

Step-by-step explanation:

16 - 15.4 = 0.6  ={0.6}{15.4} *100=0.039 * 100  =3.9%

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Solve the following equation algebraically:
Reptile [31]

Answer:

Step-by-step explanation:

divide by 3: x^2 = 4

Think you can finish that off now?

5 0
4 years ago
Factor the greatest common factor from the polynomial 3x^2 + 6x -9
ryzh [129]

Answer:

3(x+3)(x -1)

Step-by-step explanation:

3x^2 + 6x -9

All the terms in this polynomial are divisible by 3. Factor 3 out of this polynomial:

= 3(x^2 + 2x -3)

Now, factor inside the parentheses by grouping:

= 3(x^2 -1x+3x -3)

We knew to split the +2x up into -1x and 3x because -1 and 3 multiply to get -3, which is the last value in the polynomial.

= 3(x(x -1)+3(x -1))\\= 3(x+3)(x -1)

Therefore, the final factored polynomial is 3(x+3)(x -1).

4 0
2 years ago
the first four terms of a geometric progression are 2,10,50,250 a) write down the common ratio of the progression b) write down
VLD [36.1K]

Answer:

The common ratio is 5 and the 5th term is 1250

Step-by-step explanation:

The common ratio is given by

r=U(2)/U (1)

=10/2

=5

The fifth term

U (n)=ar^n-1

U(5)=2(5)^5-1

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3 0
3 years ago
Solve using the quadratic formula. Show all work. Write each solution in simplest form. No decimals.
alexira [117]

Answer:

Option B

Step-by-step explanation:

Given quadratic equation is,

12a² + 9a + 7 = 0

By comparing this equation with standard quadratic equation,

hx² + kx + c = 0

h = 12, k = 9 and c = 7

By using quadratic formula,

a = \frac{-k\pm\sqrt{k^2-4hc}}{2h}

  = \frac{-9\pm\sqrt{9^2-4(12)(7)}}{2(12)}

  = \frac{-9\pm\sqrt{81-336}}{2(12)}

  = \frac{-9\pm\sqrt{-255}}{24}

  = \frac{-9\pm i\sqrt{255}}{24}

a = \frac{-9+ i\sqrt{255}}{24},\frac{-9- i\sqrt{255}}{24}

Therefore, Option B will be the correct option.

3 0
3 years ago
Jerry is trying to earn $209 for some new video games. If he charges $47 to mow a lawn, how many lawns will he need to mow to ea
Helen [10]
At least 5. because 47x4=188 which isn’t enough money, and 47x5=235, which goes over but you have to have more money than less money
6 0
3 years ago
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