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3 years ago

Katrina is asked to simplify the expression .

Mathematics

2 answers:

Lorico [155]3 years ago

8 0

The property of distribution

Burka [1]3 years ago

7 0

Answer:

Distribution property of Multiplication allows katrina to do this.

Step-by-step explanation:

The given expression is

$-3a-4b-2(5a-7b)$

Katrina simplify the above expression as

$-3a-4b-2(5a)-2(-7b)$

$-3a-4b-10a+14b$

She use the property

$a(b+c)=ab+bc$

This property is known as Distribution property of Multiplication.

Therefore Distribution property of Multiplication allows katrina to do this.

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In the triangle, ABC, the measure of ∠A is 30° and the measure of ∠C is 90°. What is the measure of ∠B?

Molodets [167]

Answer:

60°

Step-by-step explanation:

angle A +angle B +angle C = 180

30° +B+90°= 180

120°+B=180°

B=180°-120°

B=60°

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2 years ago

The volume of 400 mL of chlorine gas at 400 mm Hg is decreased to 200 mL at constant temperature. What is the new gas pressure?

rusak2 [61]

A. Let us first assume that the gas acts like an ideal gas so that we can use the ideal gas equation:

PV = nRT

where P is pressure, V is volume, n is number of moles, R is universal gas constant and T is absolute temperature

In this case, let us assume that nRT = constant so that:

P1V1 = P2V2

400 mm Hg * 400 mL = P2 * 200 mL

P2 = 800 mm Hg

B. The collision of gas with the walls of the container produces Pressure.

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3 years ago

Read 2 more answers

7 apples cost $5. How many apples can i buy with $8?

brilliants [131]

Answer:

7 Bc ur gonna b to broke to buy some more

Step-by-step explanation:

8-5

7 0

2 years ago

[25 POINTS] The approximate change in the value of f(x) = sqrt(2(x-1)) at x = 3 using differentials with dx = 0.01 is

otez555 [7]

Answer:

$\frac{1}{200}$

Step-by-step explanation:

Find the derivative of the function when x=3

$y=\sqrt{2(x-1)}$

$\frac{dy}{dx}=\frac{1}{\sqrt{2(x-1)}}$

$\frac{dy}{dx}=\frac{1}{\sqrt{2(3-1)}}$

$\frac{dy}{dx}=\frac{1}{\sqrt{2(2)}}$

$\frac{dy}{dx}=\frac{1}{\sqrt{4}}$

$\frac{dy}{dx}=\frac{1}{2}$

Since the change in the value of the function is $dy$ and we know that the change in x is $dx=0.01$ , then we have:

$\frac{dy}{dx}=\frac{1}{2}$

$dy=\frac{1}{2}dx$

$dy=\frac{1}{2}(0.01)$

$dy=\frac{1}{200}$

Therefore, the 2nd option is correct

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2 years ago

Describe the transformations that maps triangle A to triangle A

Scilla [17]

The answer is A. If you translate the triangle 10 units up and reflect it over the y-axis, the triangle will be on top of the other.

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3 years ago