3 years ago

Find the two values for 81 squared

Mathematics

2 answers:

slava [35]3 years ago

7 0

The two values are positive 9 and negative 9

adell [148]3 years ago

6 0

The answer is plus or minus nine

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What is the inverse of the function below? f(x) = x - 4

iren2701 [21]

Answer:

f^-1(x) = x + 4

Step-by-step explanation:

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4 years ago

Solve the equation. Round to the nearest hundredth. Show work.

Burka [1]

Answer:

$x=-0.75$

Step-by-step explanation:

The given equation is

$4^{-5x-7}=6^{2x-1}$

We take logarithm of both sides to base 10.

$\log(4^{-5x-7})=\log(6^{2x-1})$

$(-5x-7)\log(4)=(2x-1)\log(6)$

We expand the brackets to get;

$-5x\log(4)-7\log(4)=2x\log(6)-\log(6)$

Group similar terms;

$-7\log(4)+\log(6)=2x\log(6)+5x\log(4)$

$-7\log(4)+\log(6)=(2\log(6)+5\log(4))x$

$\frac{-7\log(4)+\log(6)}{(2\log(6)+5\log(4))}=x$

$x=-0.752478$

To the nearest hundredth.

$x=-0.75$

3 0

3 years ago

At a manufacturing plant where switches are made, it is a known fact that 2% of all switches are defective. If two switches are

olchik [2.2K]

Answer:

The probability that exactly one switch is good is

$P(x) =0.0392$

Step-by-step explanation:

The probability that a switch is defective is:

$P(D) = \frac{2}{100} =0.02$

The probability that a switch is not defective is

$P(D') = 1-P(D)=0.98$

Therefore, if two switches are selected, the probability that exactly 1 is good is:

$P(1=1)=P (D) P (D ') + P (D') P (D)$

$P(x)=(0.02)(0.98) + (0.98)(0.02)$

$P(x) =0.0392$

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3 years ago

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Sari's mom went to the store to buy some grapes,apples and bananas. The total mass of the fruit is 72kg. She bought 18kg of grap

il63 [147K]

Answer: 25kg

Step-by-step explanation:

18 + 29 = 47

72 - 47 = 25

She got 25kg of bananas.

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3 years ago

The large sphere has a diameter of 20 feet. Which expression represents the volume, in cubic units, of the shaded part of the sp

Marat540 [252]

<span>the answer is b. π(10^3) – π(4^3)</span><span> </span>

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3 years ago

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