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3 years ago

For anyone who needs a couple extra points

Mathematics

1 answer:

ratelena [41]3 years ago

8 0

The answer is 2 bro how do you not know

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Justify each step in the solution of 5x+15=0

ratelena [41]

Subtract 15 from both sides.

5x=-15

Divide by 5

x=-5

4 0

4 years ago

Read 2 more answers

The light intensity I (in lumens) at a depth of x feet in Lake Elizabeth is given by the formula log (StartFraction Upper I Ove

antiseptic1488 [7]

Answer:

The light intensity at a depth of 24 feet is 3.0143 lumens.

The light intensity will be 7 lumenus at the depth of 9.3732 feet approximately.

Step-by-step explanation:

Consider the provided formula.

$log(\frac{I}{12})=-0.025x$

Where I is the intensity of light and x is the depth.

Part (A) Find the light intensity at a depth of 24 feet.

Substitute x=24 in above formula.

$log(\frac{I}{12})=-0.025(24)$

$log(\frac{I}{12})=-0.6$

$\frac{I}{12}=10^{-0.6}$

$\frac{I}{12}=0.2512$

$I=3.0143$

Hence, the light intensity at a depth of 24 feet is 3.0143 lumens.

Part (B) At what depth is the light intensity 7 lumens

Substitute I=7 in above formula.

$log(\frac{7}{12})=-0.025x$

$-0.23433=-0.025x$

$0.23433=0.025x$

$x=\frac{0.23433}{0.025}$

$x=9.3732$

Hence, the light intensity will be 7 lumenus at the depth of 9.3732 feet approximately.

3 0

3 years ago

At the local grocery store, cherries cost $5 for 2 pounds and $7.50 for 3 pounds How much would it cost to purchase 8 ? pounds o

sveticcg [70]

It would cost 20 dollars

6 0

3 years ago

Helppp meeeeeee asappppppp

Juliette [100K]

Answer:

9.2

Step-by-step explanation:

So the 14 can be divided equally on both sides by the fact that the line cutting it at right angle bisects it.

Thus having 6 and 7 as the two shorter sides of a right angled triangle will help us get the radius( hypotenuse in this case) using the square root of the sum of the squares of both six and 7, the Pythagoras theory.

this leads to 9.2 as our answer

5 0

3 years ago

Simplify the expression please.

pishuonlain [190]

Answer:

tanx·secx

Step-by-step explanation:

To simply this, you can begin by factoring sin x out of the numerator to become:

$\frac{sinx (sin^{2}x +cos^{2} x)}{cos^{2} x}$

Now, using Pythagorean Trig Identities, we know that sin²x+cos²x equals 1. We can substitute this to make the equation become:

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

First of all, we can convert $\frac{sinx}{cosx}$ to tanx. However, we have a remaining $\frac{1}{cosx}$ which, using reciprocal identities, will become sec x.

Finally, we get our answer as tanx·secx.

4 0

4 years ago