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3 years ago

Why do you flip the equation when solving something like 10>-9x+10?

Mathematics

1 answer:

Karolina [17]3 years ago

7 0

You flip the sign from > to < only when you are dividing by a negative number and in this case it would be negative 9.

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Cathy bought 2 jars of sauce for $3. What is the constant of proportionality ?

Lera25 [3.4K]

It's $1.50 each jar

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3 years ago

HELP WILL MARK BRAINLIEST!!!

Rainbow [258]

Answer:

Let's see what to do buddy..

Step-by-step explanation:

_________________________________

STEP (1)

We know that the quadratic functions form are like this :

$y = a \: {x}^{2} + b \: x + c$

The quadratic function opens upward so ;

$a > 0$

The axis of parabolic symmetry passes through the vertex of the parabolic.

So we know that x vertex is equal to -2.

The vertex's x is finding from this equation:

$x = - \frac{b}{2a} \\$

So we have :

$- 2 = - \frac{b}{2a} \\$

Multiply the sides of the equation by 2a :

$b = 4a$

_________________________________

STEP (2)

A quota passes through points (-3,2) and (0,11) , so points (-3,2) and (0,11) must be true in the quota equation.

$y = f(x) = a{x}^{2} + bx + c \\ \\b = 4a \\ \\ y = f(x) = a {x}^{2} + 4ax + c$

$f( - 3) = 2 \\ \\ a ({ - 3})^{2} + 4a( - 3) + c = 2 \\ \\ 9a - 12a + c = 2 \\ \\ - 3a + c = 2 \\ \\ \\ \\ f(0) = 11 \\ \\ a ({0})^{2} + 4a(0) + c = 11 \\ \\ c = 11$

$- 3a + c = 2 \\ \\ c = 11 \\ \\ - 3a + 11 = 2 \\ 11 \: goes \: to \: the \: other \: side \: \\ \\ - 3a = 2 - 11 \\ - 3a = - 9 \\ divided \: the \: sides \: of \: the \: equation \: by \: - 3 \\ a = 3$

And we're done.

Thanks for watching buddy good luck.

♥️♥️♥️♥️♥️

6 0

3 years ago

Please help me on this will give you brainliest!

jonny [76]

Answer:

Step-by-step explanation:

vhhv

6 0

2 years ago

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How do you factor 2x^2+5x-12

shtirl [24]

So you find out what two numbers add up to 5 and multiply to make -12
so since -12 is negative we know that the two numbers have to be diffarent signs (- times+=-)

also we see that the X^2 term is 2x^2 so we can use the 2
so the factored out form is
(2x+3)(x-4)
because the 2x times -4=-8x
the 3 times the x=3x
add them together and get 3x+(-8x)or 5x which is our middle term
and -4 times 3 =-12 which is our last term

7 0

3 years ago

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⚠️NEED HELP ASAP ⚠️ in the figure below ARE is similar to ADEF. Find the length of EF

zhannawk [14.2K]

Answer:

I think that the length of E and F is 6

Step-by-step explanation:

if you take 2x + 1

carry over the two on the 1 and adding it making it a 3

then it becomes x3 and x3 = to 6

so therefore I think your answer would be 6.

it is fuzzy so if it is wrong I am very sorry.

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3 years ago

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