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3 years ago

HELP ON ALL QUESTIONS!! repost NO ONE IS HELPING ME ILL GIVE 56 POINTS

Mathematics

1 answer:

mafiozo [28]3 years ago

3 0

Answer:

2. 8 * 3 - 10 = 14

3. 9 * 2 - 10 = 0

4. 5 - 15 = -10

5. 0.5 * 40 = 20

Part 3.

1. 0.25x + 30.00= 59.50

You have 118 text messages

2. 21.50x = 129

You can buy 6 pizza pies with your money

Hope these are right!!!!

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Use the quadratic formula to solve the equation <br> 25x^2-30x+25=0

Reika [66]

Answer: $x=\frac{3}{5}+i\frac{4}{5},\:x=\frac{3}{5}-i\frac{4}{5}$

Step-by-step explanation:

$25x^2-30x+25=0$

$x_{1,\:2}=\frac{-\left(-30\right)\pm \sqrt{\left(-30\right)^2-4\cdot \:25\cdot \:25}}{2\cdot \:25}$

$\sqrt{\left(-30\right)^2-4\cdot \:25\cdot \:25}$

$=\sqrt{30^2-4\cdot \:25\cdot \:25}$

$=\sqrt{30^2-2500}$

$=i\sqrt{2500-30^2}$

$=40i$

$x_{1,\:2}=\frac{-\left(-30\right)\pm \:40i}{2\cdot \:25}$

$x_1=\frac{-\left(-30\right)+40i}{2\cdot \:25},\:x_2=\frac{-\left(-30\right)-40i}{2\cdot \:25}$

$x=\frac{3}{5}+i\frac{4}{5},\:x=\frac{3}{5}-i\frac{4}{5}$

8 0

3 years ago

Please help .<br> From the equation, what is the value of the radius, r ? x2 + y2 = 144

ale4655 [162]

Answer:

should be 12 if the x and y are squared. If you meant 2x and 2y than 12 is incorrect.

Step-by-step explanation: 144=r^2.

3 0

3 years ago

Find the equation of the line shown

satela [25.4K]

Answer:

x+1

Step-by-step explanation:

5 0

3 years ago

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Which rational number could be graphed between -3 and -4

Snezhnost [94]

Answer:

-3.5

Step-by-step explanation:

An example is -3.5.

3 0

3 years ago

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Process control is nothing more or less than monitoring quality as the work is being performed. Perhaps the most widely adopted

ella [17]

Answer:

a. Grand Mean = 2.799

b. Standard Deviation = 0.01387

c. Standard Error = 0.0016

d. The range with a Z score of 3 = (2.75739, 2.84061)

Step-by-step explanation:

a. Grand mean :

Given that

Sum of 80 values = 223.91

Total observation = 80

Grand mean = 223.91/80 = 2.799

b. With the excel command "STDEV[range of cells]", we get the standard deviation as = 0.01387

c. Standard error = Standard deviation / root of n

$= 0.01387/\sqrt{80}\\ = 0.0016$

d. The range with a Z score of 3 :

lower limit = mean - (3 * SD) = 2.799 - (0.04161) = 2.75739

upper limit = mean + (3 * SD) = 2.799 + (0.04161) = 2.84061

8 0

3 years ago

HELP ON ALL QUESTIONS!! *repost* NO ONE IS HELPING ME ILL GIVE 56 POINTS

HELP ON ALL QUESTIONS!! repost NO ONE IS HELPING ME ILL GIVE 56 POINTS