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3 years ago

What is the simplified form of the expression -2(-5x - 8)?

Mathematics

1 answer:

Deffense [45]3 years ago

3 0

Answer: 10x+16

Step-by-step explanation:

Use the distributive property a(b+c)= ab+ac

-2(-5x-8) = (-2 * -5x) - (-2* -8)

10x-(-16)

=10x+16

Hope this helped!

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Evaluate the expression for the given values.<br> 12x+5y/3z, where x + 1/2, y = 6 and z = 3

Semmy [17]

Answer:

Step-by-step explanation:

Substitute: $\frac{\frac{12}{2} +5*6}{3*3}$

Cross out the common factor: $\frac{6+5*6}{3*3}$

Calculate the product or quotient: $\frac{6 +30}{3*3}$

Calculate the product or quotient: $\frac{6+30}{9}$

Calculate the sum or difference: $\frac{36}{9}$

Cross out the common factor: $4$

Answer: $4$

6 0

3 years ago

Read 2 more answers

Using a linear approximation, estimate f(2.1), given that f(2) = 5 and f'(x) = √3x-1.

algol [13]

Answer:

$f\left( {2.1} \right) \approx 5.22360$ .

Step-by-step explanation:

The linear approximation is given by the equation

${f\left( x \right) \approx L\left( x \right) }={ f\left( a \right) + f^\prime\left( a \right)\left( {x - a} \right).}$

Linear approximation is a good way to approximate values of $f(x)$ as long as you stay close to the point $x= a$ , but the farther you get from $x=a$ , the worse your approximation.

We know that,

$a=2\\f(2) = 5\\f'(x) = \sqrt{3x-1}$

Next, we need to plug in the known values and calculate the value of $f(2.1)$ :

${L\left( x \right) = f\left( 2 \right) + f^\prime\left( 2 \right)\left( {x - 2} \right) }=5+\sqrt{3(2)-1}(x-2) =5+\sqrt{5}(x-2)$

Then

$f\left( {2.1} \right) \approx 5+\sqrt{5}(2.1-2)\approx5.22360$ .

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3 years ago

Kai can walk 2 miles in a half of an hour. How far will he walk in 2 hours?

Vladimir79 [104]

Answer:

Kai will walk 8 miles

Step-by-step explanation:

Have a gr8 day!

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icang [17]

7 is in the ones place value.
9 is in the tens place value.

Hope this helps.
-Benjamin

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dolphi86 [110]

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