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3 years ago

what are some advantages of writing the polynomial expression -7x^2+32x+240 in factored form when interpreting this situation

Mathematics

1 answer:

hammer [34]3 years ago

6 0

Step-by-step explanation:

The advantages of writing the polynomial expression

-7 $x^{2}$ + 32x + 240 in factored form when interpreting this

situation

Factorizing the quadratic equation gives

-7 $x^{2}$ + 32x + 240

-7 $x^{2}$ +60x - 28x + 240

x×(-7x + 60) -4 ×(-7x + 60)

(x-4)×(-7x + 60)

The roots of the equation 4,-60/7

Advantages of writing the polynomial expression in factored

we directly know the roots

we can easily draw the graph of the quadratic

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A chemist is mixing 45% salt solution with a 30% salt solution to make 60 L of a new solution that will contain 40% salt. How mu

Alinara [238K]

Answer:

30 ml of 45% salt solution and 20 ml of 30% salt solution.

Step-by-step explanation:

Let x be the amount of 45% salt solution and y be the amount of 30% salt solution

the two equation will be:

x+y=60 -- A

0.45x+0.3y=0.4(60) -- B

Solve by substitution

Rewrite Equation A

x+y=60

x=60-y --- C

Substitute C into B

0.45(60-y)+0.3y=24

27-0.45y+0.3y=24

-0.15y=-3

y=20

Substitute the y=20 into equation C

x=60-20

x=30

Therefore, there was 30 ml of 45% salt solution and 20 ml of 30% salt solution.

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3 years ago

A new bank customer with $3,000 wants to open a money market account. The bank is offering a simple interest rate of 1.1%. How m

pickupchik [31]

$3,660

The formula is P*R*T and that stands for principal * rate * time (in years). When you use the formula and plug in all of the numbers, you get the answer $3,660.

Hopefully this helps!
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3 years ago

Math Help???

Serga [27]

Y=3x+5 is right.............

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4 years ago

I need help this due today

Georgia [21]

Answer:

Step-by-step explanation:

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3 years ago

Read 2 more answers

Graph the line with a slope of 1 passing through the point (1,-5).

Rom4ik [11]

For this case we have that by definition, the equation of a line in the slope-intersection form is given by:

Where:

m: Is the slope

b: Is the cut-off point with the y axis

According to the data of the statement we have to:

$m = 1$

Then, the equation is of the form:

$y = x + b$

We substitute the point $(1, -5)$ and find "b":

$-5 = 1 + b\\-5-1 =b\\-6 = b$

Thus, the equation is of the form:

$y = x-6$

To graph we substitute the points on the coordinate axis:

$(x, y) :( 0, -6)$

For $x = 2$ : $y = 2-6 = -4$ $(2, -4)$

For $x = 10$ : $y = 10-6 = 4$ $(10,4)$

Answer:

$y = x-6$

See attached image

7 0

3 years ago

what are some advantages of writing the polynomial expression -7x^2+32x+240 in factored form when interpreting this situation ​

what are some advantages of writing the polynomial expression -7x^2+32x+240 in factored form when interpreting this situation