PLS HELP ME <br><br> factor completely <br><br> 2x^2 + 16x -18

from the edge of a cliff 180m high, the angles of depression of two boats at sea are 43° and 52° respectively what is the distan

MrRa [10]

tan 52 = 180/a; a = 180/tan 52

tan 43 = 180/b; b = 180/tan 43

you need to calculate, a-b = 180/tan 52 - 180/tan 43

substitute the value of tan thetas, and calculate it simply...

8 0

3 years ago

What are the coordinates of the x-intercepts of the parabola y = x² - 8x + 15?

tamaranim1 [39]

Answer:

(3, 0) and (5, 0)

Step-by-step explanation:

we have

$y=x^{2}-8x+15$

we know that

The x-intercepts are the values of x when the value of y is equal to zero

so

For y=0

$x^{2}-8x+15=0$

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

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

in this problem we have

$x^{2}-8x+15=0$

so

$a=1\\b=-8\\c=15$

substitute in the formula

$x=\frac{-(-8)\pm\sqrt{-8^{2}-4(1)(15)}} {2(1)}$

$x=\frac{8\pm\sqrt{4}} {2}$

$x=\frac{8\pm2} {2}$

$x=\frac{8+2} {2}=5$

$x=\frac{8-2} {2}=3$

so

x=3, x=5

therefore

The x-intercepts are (3,0) and (5,0)

4 0

3 years ago

It’s probably rlly simple I just dk how to do it :)

Helga [31]

Answer:

18,0

Step-by-step explanation:

By useing desmos, the line has an x intercept of 18 making that the answer.

8 0

3 years ago

Read 2 more answers

Landon is building new bookshelves for his bookstore's new mystery section. Each shelf can hold 38

Novosadov [1.4K]

Answer:

33

Step-by-step explanation:

1254 divided by 38 is 33

7 0

2 years ago

Read 2 more answers

Santana went for a hike on the 21 mile South Boundary Trail. If she can hike2 miles

Katena32 [7]

Answer:

It will take santana 630 minutes or 10.5 hours to complete the 21 miles.

Step-by-step explanation:

<h3> $\frac{2}{60\\}$ $\frac{21}{y}$ y is what you are trying to find multiple her miles by the number of minutes and then divided by how many miles in 60 min. </h3><h3 /><h3 /><h3> </h3>

5 0

3 years ago

PLS HELP ME factor completely 2x^2 + 16x -18