3 years ago

I need help with math....it will help make make my day

Mathematics

1 answer:

Greeley [361]3 years ago

5 0

Answer:

148

Step-by-step explanation:

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John ran for president of the chess club. Of the 325 members in the chess club, 195 members voted for John. What percent of stud

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65%

Step-by-step explanation:

325-195=130

130/200= 65

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4 years ago

What should be subtracted from 538 to get reminder 3 when divided by 11

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Step-by-step explanation:

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3 years ago

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Graph f(x) = x2 + 2x - 3, label the function’s x-intercepts, y-intercept and vertex with their coordinates. Also draw in and lab

Semenov [28]

<h2>Answer with explanation:</h2>

The given function : $f(x)=x^2+2x-3$

Using completing the squares, we have

$f(x)=x^2+2x+1-1-3$ [∵ $(x+1)^2=x^2+2x+1$ ]

$f(x)=(x+1)^2-4$ (1)

Comparing (1) to the standard vertex form $f(x)=(x-h)^2+k$ , the vertex of function is at (h,k)=(-1,-4)

For x-intercept, put f(x)=0 in (1), we get

$0=(x+1)^2-4\\\\\Rightarrow\ (x+1)^2=4$

Square root on both sides, we get

$x+1=\pm2\\\\x+1=-2\ or\ \ x+1=2\\\\=x=-3\ \ or\ x=1$

∴ x intercepts : x= (-3,0) and (1,0)

For y-intercept put x=0 in (1), we get

$f(1)=(1)^2-4=1-4=-3$

∴ y intercept : (0,-3)

Axis of symmetry : $\dfrac{-b}{2a}$

In $f(x)=x^2+2x-3$ , a=1 and b=2

Axis of symmetry= $\dfrac{-2}{2(1)}=-1$

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4 years ago

Out of a total of 300 animal in a zoo 45 are bird's what percent of the animal in the zoo are bird's

Neporo4naja [7]

The percentage of birds in the zoo will be 15%

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3 years ago

Which expression finds the length of side b of this right triangle?

tatyana61 [14]

Answer:

$b=\sqrt{c^{2} -a^{2} }$

Step-by-step explanation:

$a^{2} + b^{2} = c^{2}$

$b^{2} =c^{2} -a^{2}$

$b=\sqrt{c^{2} -a^{2} }$

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3 years ago