Ask question

Ask question

All categories

3 years ago

14

Can someone please explain to me how to find the answer 7+ 4x + 5x

1 answer:

EleoNora [17]3 years ago

5 0

Since you have two numbers that have a (x) at the ends of them, you add those first then add seven which will end up being 9x+7

You might be interested in

2x squared + 9x=-5 i need to solve for x

In-s [12.5K]

$2x^2+ 9x=-5 \\ \\2x^2 + 9x+5 =0 \\\\a=2, \ \ b=9 , \ \ c=5 \\\\\Delta =b^2-4ac = 9^2 -4\cdot 2\cdot 5 = 81-40=41 \\ \\x_{1}=\frac{-b-\sqrt{\Delta} }{2a}=\frac{-9-\sqrt{41}}{2\cdot 2 }=\frac{-9-\sqrt{41}}{ 4 }\\\\ x_{2}=\frac{-b+\sqrt{\Delta} }{2a}=\frac{-9+\sqrt{41}}{2\cdot 2 }=\frac{-9+\sqrt{41}}{4 }$

3 0

3 years ago

Please help with the questions in the image

iren2701 [21]

Step-by-step explanation:

This seems to be calculus 1.

<u>Question a</u>

We have $-2x^3 + 5x^2 + 9$

m = slope = derivative

Find the derivative / slope of $-2x^3 + 5x^2 + 9$

We do this by differentiating the polynomials. There are a few methods to do this but I am going to use the power rule, which we multiply the constant by the exponent on the variable and subtract one from the exponent.

$\frac{d}{dx}(-2x^3 + 5x^2 + 9)$

$-6x^2 + 10x$

$m = -6x^2 + 10x$ when x = a

<em>Now that we have this information, we can answer question b</em>

<u>Question b</u>

<u>The tangent line for Point (1, 12)</u>

First find the slope by using our derivative.

$m = -6x^2 + 10x$

$m = -6(1)^2 + 10(1)$

$m = -6 + 10x$

$m = 4$

Now that we have our slope, use point slope form to find our tangent line

$y - 12 = 4(x - 1)$

$y(x) = 4x + 8$

<u>Now lets do the same for the Point (2, 13)</u>

Find the slope at the point.

$m = -6x^2 + 10x$

$m = -6(2)^2 + 10(2)$

$m = -24 + 10$

$m = -4$

Now find the tangent line using point slope form of a line.

$y(x) - 13 = -4(x - 2)$

$y(x) = -4x + 21$

Now graph the lines, which I have done and you can see by viewing the image I have attached.

6 0

3 years ago

ILL BRAINLIEST YOU IF YOU HELP ME PLEASE

JulsSmile [24]

Answer:

C

Step-by-step explanation:

U just gotta learn the definitions

5 0

2 years ago

Read 2 more answers

Please answer this find the circumference for each of them TYSMMM

artcher [175]

For a , C= 18.85
for b , C= 21.99
for 1 , C= 75.4
for 2 , C= 87.96

6 0

2 years ago

PLS HELP!!<br><br> Solve for x.<br><br> (763)(50)/295 = (760)(x)/273

Morgarella [4.7K]

X=75

1,108-1,033= 75

That is why it's that answer.

4 0

2 years ago

Read 2 more answers