3 years ago

Can someone help with these ?

Mathematics

1 answer:

NNADVOKAT [17]3 years ago

5 0

Answer:

sorry for the first one am not sure if its 22 or 10

You might be interested in

Please help me there can only be one answer

12345 [234]

Answer:-
I think it’s the last option where x and y both are zero.
2x + 2y = 0
Here x = 0 and y = 0.
Hope it helps if u hv any questions feel free to ask...hv a grt day :)

4 0

3 years ago

A teacher is choosing 4 students from a class of 30 to represent the class at a science fair. In how many ways can the teacher c

marin [14]

${30 \choose 4}=\frac{30!}{4!26!}=\frac{27\cdot28\cdot29\cdot30}{2\cdot 3\cdot4}=27\cdot7\cdot29\cdot5=27405$

4 0

3 years ago

PLEASE HELP ME I HAVE OTHER HOMEWORK TO BE FINISHED!!

Butoxors [25]

Step-by-step explanation:

Pyramid

1/2 * 12 * 15

6 * 15 = 90

90 * 4 = 360cm

Cube

12 * 12 = 144

144 * 4 = 576cm

576 + 360 =

936 cm² of paint

4 0

3 years ago

Harry has decided to give his collection of 24 old coins to his four grandsons. John, the oldest, gets half the collection. Walt

Aleksandr [31]

John gets 12, Walt, Matt, and Richie get 4 each

5 0

4 years ago

Read 2 more answers

Find all solutions to the equation.<br><br> cos^2x + 2 cos x + 1 = 0

natali 33 [55]

$\bf cos^2(x)+2cos(x)+1=0\implies \stackrel{\textit{let's notice, this is simply }ax^2+bx+c=0}{[cos(x)]^2+2cos(x)+1=0} \\[2em] [cos(x)+1][cos(x)+1]=0 \\\\[-0.35em] ~\dotfill\\\\ cos(x)+1=0\implies cos(x)=-1\implies x=cos^{-1}(-1)\implies \stackrel{\textit{for the range }[0,2\pi ]}{x=\pi } \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill \stackrel{\textit{all solutions}}{x=\pi +2\pi n~~,~~ n \in \mathbb{Z}}~\hfill$

6 0

3 years ago