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4 years ago

Find (2x^2 + 2) + (x^2-4) – (3x^2 + 1)

Mathematics

2 answers:

Butoxors [25]4 years ago

6 0

Answer:

$- 3$

Step-by-step explanation:

$2 {x}^{2} + 2 + ( {x}^{2} - 4) - (3 {x}^{2} + 1) \\ 2 {x}^{2} + 2 + {x}^{2} - 4 - 3 {x}^{2} - 1 \\ 2 {x}^{2} + {x}^{2} - 3 {x}^{2} + 2 - 4 - 1 \\ = - 3$

lidiya [134]4 years ago

5 0

Step-by-step explanation:

hope this is right I got this answer on one my fav website tiger

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Select all ratios equivalent to 5:10 Select all that apply. * 4:6 8:16 7:14

konstantin123 [22]

Answer:

8:16

7:14

Step-by-step explanation:

all equal to 1:2

3 0

3 years ago

Read 2 more answers

Mark said that the number 0.05 has a value 10 times greater than 0.5 is he correct

Anna71 [15]

No he is not because 0.5 would be 0.50 and 0.05 is lower than 0.5

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4 years ago

The domain of f(x) is the set of all real values except 7, and the domain of g(x) is the set of all real values except -3. Which

Maurinko [17]

Answer:

The option is: all real values except x = 7 and the x for which f(x) = -3

Step-by-step explanation:

As the domain of f(x) is the set of all real values except 7. So it can be written as follows:

Domain of f(x) = { x ∈ R | x ≠ 7}

As the domain of g(x) is the set of all real values except -3. So it can be written as follows:

Domain of g(x) = { x ∈ R | x ≠ -3}

It is a common rule that the domain of a composite function (gºf)(x) will be the set of those input x in the domain of f for which f(x) is in the domain of g.

So, the option is: all real values except x = 7 and the x for which f(x) = -3

Keywords: domain, composite function

Learn more domain and composite functions from brainly.com/question/2073574

#LearnwithBrainly

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3 years ago

You are choosing sprinklers for an irrigation system. One sprinkler that covers a full circle specifies a watering radius of 14

mihalych1998 [28]

Answer:

Area= 615 ft²

Step-by-step explanation:

Apply the formula for area of a circle to find the area watered when a sprinkler covers a full circle

Area of a circle= $\pi r^{2}$

r= 14ft

Area= 3.14 × 14²

Area=615.44 ft²

Area= 615 ft²

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3 years ago

The time, t, required to travel a fixed distance varies inversely as the

Lemur [1.5K]

You must travel at 42 mph for 4 hours

Solution:

Time varies inversely as rate of motion

Let "t" be the time required

Let "r" be the rate of motion

Then, we get

$t \propto \frac{1}{r}\\\\t = k \times \frac{1}{r}\\\\t = \frac{k}{r} -------- eqn 1$

Where, "k" is the constant of proportionality

You travel 3 hours at a rate of 56 mph

Substitute t = 3 and r = 56 in eqn 1

$3 = \frac{k}{56}\\\\k = 3 \times 56\\\\k = 168$

Find the rate you must travel for 4 hours

r = ? and t = 4

Substitute t = 4 and k = 168 in eqn 1

$4 = \frac{168}{r}\\\\r = \frac{168}{4}\\\\r = 42$

Thus you must travel at 42 mph for 4 hours

4 0

4 years ago

Find (2x^2 + 2) + (x^2-4) – (3x^2 + 1)​

Find (2x^2 + 2) + (x^2-4) – (3x^2 + 1)