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3 years ago

5+ X -12 equals 2X -7

Mathematics

1 answer:

Anna35 [415]3 years ago

6 0

Hey there,

Based on the statement above, this would actually be very false.

5+-7= -2

-2 would actually be the correct answer.

Hope this helps

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Please help and thank you

vladimir2022 [97]

Answer: A & D

Explanation: When you multiply 15 and 4 and add that to 20 and 2 it would be 100. When you multiply 25 and 4 and add that to 25 and 2 it would be 150. Hope this helps :).

7 0

3 years ago

Select the correct answer from each drop-down menu.

mr_godi [17]

Answer:

correct option for first blank is 5/4 and for second blank is $\frac{ 3i\sqrt{7}}{4}$

i.e m= $\frac{5}{4}\pm\frac{ 3i\sqrt{7}}{4}$

Step-by-step explanation:

The given equation

$m^2 - \frac {5m}{2} = \frac{-11}{2}$

and we have to find m= ______ ± ________

We can use quadratic formula to solve this question.

The above equation can be written as: $m^2 - \frac {5m}{2} + \frac{11}{2} = 0$

and the formula used will be:

$m= \frac{-b\pm\sqrt{b^2-4ac}}{2a}$

Putting values of a= 1, b= -5/2 and c= 11/2 and solving we get: $m=\frac{-\frac{-5}{2}\pm\sqrt{{(\frac{-5}{2})}^2-4(1)(\frac{11}{2})}}{2(1)}\\\\m=\frac{\frac{5}{2}\pm\sqrt{(\frac{25}{4})-22}}{2}\\m=\frac{\frac{5}{2}\pm\sqrt{(\frac{-63}{4})}}{2}\\m= \frac{\frac{5}{2}}{2}\pm\frac{\sqrt{(\frac{-63}{4})}}{2}\\m= \frac{5}{4}\pm\frac{\sqrt{-63}}{4}$

Since there is - sign inside the √ so $\sqrt{-1}$ is equal to i and we have to divide $\sqrt{63}$ into its multiples such that the square root of one multiple is whole no so,

$\sqrt{63}$ = $\sqrt{9}* \sqrt{7}$ = $3* \sqrt{7}$

Putting value of $\sqrt{63}$ and $\sqrt{-1}$

the value of m= $\frac{5}{4}\pm\frac{ 3i\sqrt{7}}{4}$

so, correct option for first blank is 5/4 and for second blank is $\frac{ 3i\sqrt{7}}{4}$ .

7 0

3 years ago

How to find the pair solution to the equation

yulyashka [42]

Answer:

To figure out if an ordered pair is a solution to an equation, you could perform a test. Identify the x-value in the ordered pair and plug it into the equation. When you simplify, if the y-value you get is the same as the y-value in the ordered pair, then that ordered pair is indeed a solution to the equation.

Step-by-step explanation:

3 0

3 years ago

Find the discriminant of the following equation.<br><br> 4x2 + 12x + 9 = 0

oksano4ka [1.4K]

For
ax^2+bx+c=0
discriminatn is b^2-4ac

a=4
b=12
c=9
discriinat is
12^2-4(4)(9)=
144-144
0

the discrminat is 0

8 0

3 years ago

Is a temperature of 0.75 °C positive or negative?

Zina [86]

The answer is positive

3 0

4 years ago