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3 years ago

6

What is the value of (3 with an exponent of 2 + 1 ) -14 divided by 2

1 answer:

rusak2 [61]3 years ago

8 0

Any answer choices?
Im not sure if i am right but if i am i want to make sure

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Find the vertex of this parabola:<br> y = -x2 + 6x – 15

Orlov [11]

$y = - x {}^{2} + 6x - 15$

$y {}^{ \gamma } = - 2x + 6$

$y {}^{ \gamma } = 0$

$- 2x + 6 = 0$

$- 2x = - 6$

$2x = 6$

$x = 3$

<h3>Substitute x=3 in y=-x²+6x-15</h3>

$y = - (3) {}^{2} + 6(3) - 15$

$y = - 9 + 18 - 15$

$y = - 9 + 3$

$y = - 6$

<h2><em>Vertex:</em><em> </em><em> </em><em>(</em><em>3</em><em>,</em><em>-</em><em>6</em><em>)</em></h2>

8 0

2 years ago

Read 2 more answers

John weighs 1.5 times as much as Ellen. If John weighs 144 pounds, how many pounds does Ellen weigh?

Alexus [3.1K]

Answer:

96 lbs.

Step-by-step explanation:

144 divided 1.5 = 96

7 0

3 years ago

The last time Sierra played softball, she hit the ball 45% of the times she was at bat. Based on this information, how many time

Ymorist [56]

Answer:

Number of times she will hit the ball the next time she plays softball if she is at bat 20 times = 9 times

Step-by-step explanation:

Percentage of times Sierra hit the ball when she was at bat playing softball= 45%

So, we can find:

Number of times she will hit the ball the next time she plays softball if she is at bat 20 times = $\textrm{45\% of 20 times} =0.45\times 20=9\ times$

3 0

3 years ago

I need help on this it’s about trig identities

Cerrena [4.2K]

Answer:

The answer to your question is:

Step-by-step explanation:

1.-

$\frac{1 + sin\alpha }{cos\alpha } + \frac{cos\alpha }{1 + sin\alpha } = 2 sec\alpha$

$\frac{(1 + sin\alpha)^{2} + cos^{2} \alpha }{cos\alpha (1 + sin\alpha) }$

$\frac{1 + 2sin\alpha + sin^{2} \alpha+ cos^{2} \alpha }{cos\alpha + sin\alphacos\alpha }$

$\frac{2 + 2sin\alpha }{cos\alpha+ sin\alpha cos\alpha }$

$\frac{2(1 + sin\alpha) }{cos\alpha(1 + sin\alpha ) }$

$\frac{2}{cos\alpha }$

2sec $\alpha$

2.-

sec²x - tanxsecx

$\frac{1}{cos^{2}x } - \frac{sinx}{cosx} \frac{1}{cosx}$

$\frac{1}{cos^{2} x} - \frac{sinx}{cos^{2}x}$

$\frac{1 - sinx}{cos^{2}x }$

$\frac{1 - sinx}{1 - sin^{2}x }$

$\frac{1 - sinx}{(1 - sinx)(1 + sinx)}$

$\frac{1}{1 + sinx}$

3 0

3 years ago

Help Please !!! Math

Keith_Richards [23]

The 3rd one I thinkkkkk ??

6 0

3 years ago