3 years ago

Please help me:( I’ve been stuck on this one for so long

Mathematics

1 answer:

Ronch [10]3 years ago

7 0

Answer: A. 9x^2+2x-5

Step-by-step explanation: its just adding the two numbers from right to left so +3-8= -5 then -5x+7x=2x then 6x^2+3x^2= 9x^2 so putting them together equals 9x^2+2x-5

You might be interested in

Solve the equation for solutions over the interval [0°, 360°).

olchik [2.2K]

Answer:

$x=98.13^\circ,135^\circ,278.13^\circ,315^\circ$

Step-by-step explanation:

$tan^2x+7tanx+8=0,[0^{\circ},360^\circ)$

$tan^2x+7tanx+8=0$

$u=tanx$ <-- U-substitution

$u^2+7u+8=0$

$(u+7)(u+1)=0$

$(tanx+7)(tanx+1)=0$ <-- Replace u with tanx

$tanx+7=0$

$tanx=-7$

$x=98.13^\circ,278.13^\circ$

$tanx+1=0$

$tanx=-1$

$x=135^\circ,315^\circ$

Therefore, $x=98.13^\circ,135^\circ,278.13^\circ,315^\circ$

6 0

3 years ago

John runs a computer software store. Yesterday he counted 127 people who walked by his store, 58 of whom came into the store. Of

skelet666 [1.2K]

So probabilities are defined as "what we want to happen" divided by "all of the options". 127 is all the people who walked by. 25 is all of the people who did what we want. So, 25/127 = .1969 or 19.69%.

Strangely, one could ponder this question in another way. One could first get the probability that they walk in (58/127) and then multiply it by the probability that they buy something (25/58). This turns out to give you the same answer.

3 0

3 years ago

A circular table has a diameter of 48". The table can be enlarged by inserting two rectangular leaves, each 18" wide and 48" lon

lukranit [14]

48 x 18 = 864

864 x 2 = 1728

1728 sq in

6 0

4 years ago

Read 2 more answers

At a coffee shop, the first 100 customers'

Paladinen [302]

$\frac{1}{5}$