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2 years ago

How to solve 2x²+3x-3=2x

Mathematics

2 answers:

ELEN [110]2 years ago

8 0

The answer would be x = -3/2 and x = 1

NNADVOKAT [17]2 years ago

6 0

Answer:

x=1 or x=-2/3

Step-by-step explanation:

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Use substitution to solve the system of equations.

adelina 88 [10]

Answer:

(2, -5)

Step-by-step explanation:

x is defined by the first equation as x = -3y – 13. Substitute -3y – 13 for x in the second equation:

2( -3y – 13) + 2y = -6.

Performing the indicated multiplication, we get:

-6y - 26 + 2y = -6

Combining like terms results in:

-4y = 20, so that y = -5

Using the first equation, we find x for y = -5:

x = -3(-5) - 13 = 2

The solution is thus (2, -5) (Answer C)

5 0

3 years ago

Read 2 more answers

Mrs. smith has 5 times as many markers and colored pencils is 54.How many markers does mrs. smith have

Vilka [71]

Answer:

The answer is 270

Step-by-step explanation:

5×54=270

3 0

2 years ago

Read 2 more answers

A candidate for a US Representative seat from Indiana hires a polling firm to gauge her percentage of support among voters in he

mojhsa [17]

Answer:

(A) The minimum sample size required achieve the margin of error of 0.04 is 601.

(B) The minimum sample size required achieve a margin of error of 0.02 is 2401.

Step-by-step explanation:

Let us assume that the percentage of support for the candidate, among voters in her district, is 50%.

(A)

The margin of error, MOE = 0.04.

The formula for margin of error is:

$MOE=z_{\alpha /2}\sqrt{\frac{p(1-p)}{n}}$

The critical value of z for 95% confidence interval is: $z_{\alpha/2}=1.96$

Compute the minimum sample size required as follows:

$MOE=z_{\alpha /2}\sqrt{\frac{p(1-p)}{n}}\\0.04=1.96\times \sqrt{\frac{0.50(1-0.50)}{n}}\\(\frac{0.04}{1.96})^{2} =\frac{0.50(1-0.50)}{n}\\n=600.25\approx 601$

Thus, the minimum sample size required achieve the margin of error of 0.04 is 601.

(B)

The margin of error, MOE = 0.02.

The formula for margin of error is:

$MOE=z_{\alpha /2}\sqrt{\frac{p(1-p)}{n}}$

The critical value of z for 95% confidence interval is: $z_{\alpha/2}=1.96$

Compute the minimum sample size required as follows:

$MOE=z_{\alpha /2}\sqrt{\frac{p(1-p)}{n}}\\0.02=1.96\times \sqrt{\frac{0.50(1-0.50)}{n}}\\(\frac{0.02}{1.96})^{2} =\frac{0.50(1-0.50)}{n}\\n=2401.00\approx 2401$

Thus, the minimum sample size required achieve a margin of error of 0.02 is 2401.

8 0

3 years ago

Victor is on a volcanic island. He needs to get back to his ship before the volcano explodes, but he would also like to get the

damaskus [11]

Answer:

0.4

Step-by-step explanation:

did it in khan

6 0

2 years ago

The perimeter of the triangle below is 6a+2b-5 units. write an expression to represent the length in units, of the missing side

ANTONII [103]

Answer:

3a + 5b - 2

Step-by-step explanation:

The perimeter is the sum of all 3 sides of the triangle.

To find the missing side (x ) sum the 2 known sides and subtract from the perimeter.

x = 6a + 2b - 5 - (2a + 6b - 6 + a - 9b + 3 ) ← simplify parenthesis

= 6a + 2b - 5 - (3a - 3b - 3 ) ← distribute by - 1

= 6a + 2b - 5 - 3a + 3b + 3 ← collect like terms

= 3a + 5b - 2 ← length of missing side

3 0

3 years ago

How to solve 2x²+3x-3=2x​

How to solve 2x²+3x-3=2x