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goldfiish [28.3K]
4 years ago
14

Solve this quadratic equation using the quadratic formula. 2x2 - 10x + 7 = 0

Mathematics
2 answers:
frez [133]4 years ago
8 0

Answer:

Step-by-step explanation:

2x^2-10x+7         A=1, B=-10. C=7

-(-10)±√-10^2-4(1)(7)

------------------------------

2(1)

10±√100-28

----------------

2

10±√72

-----------

2

<u>10±8.485281374</u>

         2

<u>10+8.485281374 </u>=9.24

             2

<u>10-8.485281374</u> =0.76

          2

alexgriva [62]4 years ago
5 0

Answer:

x= 5/ 2 + 1/2  √11

or  x= 5/ 2 + −1/ 2 √11

Step-by-step explanation:

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Kraig deposited money into a money market account. It has an interest of 12% and is compounded annually. Kraig thought 3% would
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Answer:

<u>If the amount is P, with the interest rate of 12%, the interest over the year is:</u>

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<u>In this case the quarterly interest rate is:</u>

  • 0.12P/4 = 0.03P

<u>With the same amount and 3% quarterly rate, the yearly interest would be:</u>

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<u>The quarterly interest rate in this case is:</u>

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If the quarterly interest rate is r, it should be little less than 3% to yield a 12% yearly rate.

So Kraig is wrong.

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3 years ago
Find the measure of angle ABD if the measure of angle DBC is 42 degrees and the measure of angle ABC is 88 degrees
snow_lady [41]

    First, realize that angle ABC is the sum of the two other angles. Hence, form an equation in which you subtract the measure of one of the angles from angle ABC to get the measure of the other angle -- the one you are solving for.

6 0
3 years ago
4(PX+1)=64 what is the value of x in terms of p and what is the value of x when p is -5 ?
Oksana_A [137]

Answer:

x = -3

Step-by-step explanation:

4(PX+1)=64\\\\p= -5

Substitute -5 for p in the given equation and solve

4(-5(x)+1)=64\\\\\mathrm{Divide\:both\:sides\:by\:}4\\\frac{4\left(-5x+1\right)}{4}=\frac{64}{4}\\\\Simplify\\-5x+1=16\\\\\mathrm{Subtract\:}1\mathrm{\:from\:both\:sides}\\-5x+1-1=16-1\\\\Simplify\\-5x =15\\\\\mathrm{Divide\:both\:sides\:by\:}-5\\\frac{-5x}{-5}=\frac{15}{-5}\\\\Simplify\\x = -3

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3 years ago
In a survey, 56 percent of people surveyed stated truthfully that they were married, while 30 percent of the people surveyed who
lilavasa [31]

Answer:

15 surveyed

Step-by-step explanation:

8 0
4 years ago
If ABCDE is reflected over the x-axis and then translated 3 units left, what are the
Aloiza [94]

Answer:

(-6,1)

Step-by-step explanation:

A. Reflection

When you reflect a point (x, y) across the x-axis, the x-coordinate remains the same, but the y-coordinate gets the opposite sign.

Thus, D (-3,-1) ⟶ D' (-3, 1)

B. Translation

When you translate a point horizontally, its x-coordinate changes, but the y-coordinate. remains unchanged.

You translated the point 3 units to the left.

D'(-3, 1) ⟶ D"(-6,1)

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