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3 years ago

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What is the discriminant of 3x^2+6x=2

1 answer:

IgorC [24]3 years ago

7 0

$ax^2+bx+c=0\\\\the\ discriminant:\Delta=b^2-4ac\\============================\\\\3x^2+6x=2\ \ \ \ \ |subtract\ 2\ from\ both\ sides\\\\3x^2+6x-2=0\\\\a=3;\ b=6;\ c=-2\\\\\Delta=6^2-4\cdot3\cdot(-2)=36+24=\boxed{60}\leftarrow answer$

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Alik [6]

Answer:

2cm of Rainfall

Step-by-step explanation:

When the no. of mosquitoes is the highest the slope of graph will be zero

so if we differentiate this function and equate to zero we can find the rainfall amount that gives maximum number of mosquitoes in centimetres.

m(x)= -x²+4x

differentiate

d(x)/d(m(x))= -2x+4

equate to zero

-2x+4=0

2x=4

x=2

answer: 2 cm of rain

6 0

3 years ago

Evaluating expressions:<br> 1. x + 9 when x = 3

balu736 [363]

⇨ The numeric value of this expression = 12.

<h3> </h3>

To solve this expression, just <u>replace '</u><u>x</u><u>'</u> by the <em>indicated value</em>, being the number 3, and <em>perform</em> the <em>indicated </em>math <em>operations</em>.

${\large \displaystyle \sf {1 \cdot x+9 }}$

${\large \displaystyle \sf {x=3 }}$

${\large \displaystyle \sf {1 \cdot 3+9 }}$

${\large \displaystyle \sf { 3+9 }}$

${\orange{\boxed{\boxed{\pink {\large \displaystyle \sf { \ 12 \ }}}}}}\\\\$

Therefore, we can conclude that, the correct value of this expression = 12.

${\orange{\boxed{\boxed{\pink {\large \displaystyle \sf { \ 12 \ }}}}}}\\\\$

<h3><em>Hope this helps! ❤️</em></h3>

4 0

2 years ago

C 6. Use the item bank to write the name of the figure in the box that describes its properties. Some names will be used more th

Luden [163]

Use Picture Math, i cant type in the other cause brainly doesn't accept it but it is Ga_thMath. (u)

7 0

3 years ago

A fence builder uses boards 3 1/2 feet long for the vertical slats on the fence. How many slats can be made from a board that is

faust18 [17]

Answer:

12 slats can be made from a board i,e 42 feet long

Step-by-step explanation:

As per the given statement: A fence builder uses boards $3\frac{1}{2}$ feet long for the vertical slats on the fence.

We have to calculate how many slats can be made from a board that is 42 feet long.

Builder uses board $3\frac{1}{2} = \frac{7}{2}$ feet long for the vertical slats.

then;

for 42 feet long = $\frac{42}{\frac{7}{2} } = 42 \times \frac{2}{7} = 6 \times 2 = 12$ slats can be made.

Therefore, 12 slats can be made from a board that is 42 feet long.

7 0

3 years ago

Are the two expressions equivalent when x=4 4(2+3x) 8+12x

zmey [24]

4(2+3x)= 4(2+12) = 4× 14= 56

8+12x =8+12×4=8+48= 56
Yeah, it's equal! Have a great day!

7 0

3 years ago

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