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4 years ago

Evaluate the following f(-2)=2x-7

Mathematics

2 answers:

devlian [24]4 years ago

3 0

Answer:

-11

Step-by-step explanation:

f(x)=2x-7

Let x = -2

f(-2)=2(-2)-7

= -4 -7

= -11

Alja [10]4 years ago

3 0

2(-2) - 7 =
-4 - 7 =

Answer : -11

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(x+16)²=12 plz help me and show work

Readme [11.4K]

Answer:

The answer is $x=-16$ ± $2\sqrt{3}$ in exact form or $x=-12.535898$ , $x=-19.464102$ in decimal form.

Step-by-step explanation:

To solve this problem, start by moving all terms to the left side of the equation and simplify. Simplify the equation by subtracting 12 from both sides of the equation and squaring $x+16$ , which will look like $x^{2} +32x+256-12=0$ . Next, simplify the equation again, which will look like $x^{2} +32x+244=0$ .

Then, use the quadratic formula to find the solutions. The quadratic formula looks like $\frac{-b(+-)\sqrt{b^{2}-4ac } }{2a}$ .

For this problem, the quadratic variables are as follows:

$a=1$

$b=32$

$c=244$

The next step is to substitute the values $a=1$ , $b=32$ , and $c=244$ into the quadratic formula and solve. The quadratic formula will look like $\frac{-32(+-)\sqrt{32^2-4(1*244)} }{2*1}$ . To simplify the equation, start by simplifying the numerator, which will look like $x=\frac{-32(+-)4\sqrt{3} }{2*1}$ . Then, multiply 2 by 1 and simplify the equation, which will look like $x=-16(+-)2\sqrt{3}$ . The final answer is $x=-16$ ± $2\sqrt{3}$ in exact form. In decimal form, the final answer is $x=-12.535898$ , $x=-19.464102$ .

6 0

3 years ago

Wendy has $27 to buy seed for her birdfeeders. Each bag of seed costs $5.

Alekssandra [29.7K]

Answer:

Step-by-step explanation:

If Wendy has $27 to buy seeds, and each seed bag costs $5, then:

5 · 5 = 25

5 · 6 = 30

27<30

27>25

So, Wendy is able to buy 5 bags and remain with 2 dollars.

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3 years ago

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Suppose that the relation H is defined as follows.

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ANSWER:
Domain: {3, 7, 4, a}
Range: {a, b, 4, 0}

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3 years ago

2/3 to the third power fraction form

xxTIMURxx [149]

Answer:

8/27

Step-by-step explanation:

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2 years ago

There are three groups of elderly residents at Bayside Residential Home, one with 14 members, the next with 23 members, and the

Arturiano [62]

Answer:

Total Cost - 54c

Step-by-step explanation:

Given is 3 groups of elderly residents at the Bayside Residential Home. One of the home has 14 members, another one with 23 members and the third one with 17 members. Supposing that 'c' represent the cost of trip per resident.

Calculation,

Total of residence

14+23+17

= 54 residents

Hence, since there are 54 residents, total cost 54c.

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4 years ago