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Nitella [24]
3 years ago
14

Error analysis: describe and correct the error in solving the equation.

Mathematics
1 answer:
maw [93]3 years ago
8 0
The only solution of the equation is x=0
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13. I think it is miles
babymother [125]

Answer:

I think it would be miles.

7 0
3 years ago
2. √2x-5-√x+6=0(solving the following radical equations and check for extraneous solutions)
Norma-Jean [14]

I assume the equation is

√(2x - 5) - √(x + 6) = 0

Note the domains for the root expressions:

• √(2x - 5) : 2x - 5 ≥ 0   ⇒   x ≥ 5/2

• √(x + 6) : x + 6 ≥ 0   ⇒   x ≥ -6

So any valid solution we find must be at least 5/2.

Move one term to the other side.

√(2x - 5) = √(x + 6)

Take squares.

(√(2x - 5))² = (√(x + 6))²

2x - 5 = x + 6

Solve for x :

x = 11

5 0
2 years ago
For each pair of points below, think about the line that joins them. For which pairs is the line parallel to the x-axis? Circle
Ksivusya [100]

Answer:

The correct answer is (b).

Step-by-step explanation:

A line is parallel to the x axis if it has a slope equal zero. Then if we compute the slope of the line that joins  the points (3,9), (8,9) then

m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}=\frac{9-9}{3-8}=\frac{0}{-5}=0

This implies that the line which that joins this points is parallel to the x-axis.

Observe that the slopes of the lines corresponding to the other items are nonzero.

8 0
3 years ago
Order of operation. Cards 2,4,5,8,16 . Target number is 10
erastovalidia [21]
3847474737464644647474747474747
8 0
3 years ago
Alyssa has 30 pencils, where 60% of the pencils are sharpened. How many sharpened pencils does Alyssa have?
tresset_1 [31]

Answer:

18 sharpened pencils

Step-by-step explanation:

Total = 30 pencils

100% = 30 pencils

1% = 30 ÷ 100 = 0.30

60% = 0.30 x 60 = 18

3 0
3 years ago
Read 2 more answers
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