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Natalka [10]
3 years ago
11

Luca solved an equation as shown, and verified that his solution was correct. Explain what Luca’s error is and why his answer is

not completely correct.
Mathematics
2 answers:
DaniilM [7]3 years ago
6 0

Answer:

Does your response include the following?

Luca did not square the right side of the equation properly.

When the binomial with the radical term is squared, the result still has a radical.

After simplifying, both sides of the equation have to be squared again.

After simplifying, the resulting quadratic trinomial can be solved by factoring.

There are actually two solutions: x = 3 and x = 7.

Step-by-step explanation:

inysia [295]3 years ago
5 0
*luca did not square right side of equation properly
*When the binomial with the radical term is squared, the result still has a radical
*There are 2 solutions x=3 and x=7
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The ratio of the measures if the sides of a triangle is 4:6:8, and its perimeter is 126 feet. What are the measures of the sides
N76 [4]

Answer:

56  feet.

Step-by-step explanation:

4k+6k+8k=18k=126⟹k=7

Therefore, the lengths are 4⋅7=28, 6⋅7=42 and 8⋅7=56 feet.

6 0
3 years ago
Find the zero F(x)=2x² - 16x + 24/X² + 2x - 24
julia-pushkina [17]
Factor both the top and bottom.

(2(x-6)(x-2))/((x+6)(x-4))

To find zeros, the numerator must be 0. The denominator cannot be 0 because anything divided by 0 is infinity.

(x-6)=0
x=6

(x-2)=0
x=2

Final answer: x=2, x=6
3 0
4 years ago
Paula kitten weighs 3 1/2 pounds write this weight in the boxes using pounds and ounces.
Elenna [48]

Answer:

Step by step explanation

First, we have to convert 3 1/2 into a decimal, so we have to do the following:

1/2 = 1 divided by 2 3 1/2 = 3 + (1÷2) = 0.5 (1 ÷ 2 done by long division)

Then we add the whole number.

3 + 0.5 = 3.5

Next, we multiply

3.5 x 16 = 56 ounces.

3 0
3 years ago
Read 2 more answers
For the function -2x²+x+1 find f(3)
nexus9112 [7]

Answer:

-14

Step-by-step explanation:

Plug 3 in for x

-2 (3)² + 3 + 1

-2 (9) + 3 + 1

-18 + 3 + 1

-14

3 0
3 years ago
Read 2 more answers
Please show me the steps of doing this question if you know how, ty.
dolphi86 [110]

The arc length is the product of the angle measure in radians and the radius.

... s = r·θ

So, the angle in radians is the ratio of arc length to radius.

... θ = s/r

To convert from radians to degrees, multiply by the conversion factor 180°/(π radians).

... y = s/r·(180°/π)

Then the angle is between

... 15/20·180/π ≈ 42.97

and

... 16/20·180/π ≈ 45.84

Suitable integers in this range are 43, 44, and 45.

One possible integer value of y is 44.

7 0
3 years ago
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