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3 years ago

What is f(x)=4x^2+19 find f(-5)

Mathematics

1 answer:

katovenus [111]3 years ago

7 0

Answer:

Step-by-step explanation:

f(x)=4x²+19

f(-5) = 4(-5)² + 19 = 4*25 + 19

= 100 + 19 = 119

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Solve by completing the square. Round your answers to the nearest tenth and then locate the greater solution. <img src="https://

Andrews [41]

Step-by-step explanation:

Step 1: Write our Givens

${x}^{2} + 10x - 7 = 0$

Move the constant term ,(the term with no variable) to the right side.

Here we have a negative 7, so we add 7 to both sides

${x}^{2} + 10x = 7$

Next, we take the linear coeffeicent and divide it by 2 then square it.

$( \frac{10}{2} ) {}^{2} = 25$

Then we add that to both sides

${x}^{2} + 10x + 25 = 7 + 25$

${ {x}^{2} } + 10x + 25 = 32$

Next, we factor the left,

$(x + 5)(x + 5) = 32$

we got 5 because 5 add to 10 and multiply to 25 as well.

so we get

$(x + 5) {}^{2} = 32$

This is called a perfect square trinomial.

Next, we take the square root of both sides

$x + 5 = ± \sqrt{32}$

± menas that we have a positive and negative solution.

Subtract 5 form both side so we get

$x = - 5± \sqrt{32}$

The greater solution is when sqr root of 32 is positive so the answer to that is

$\sqrt{32} - 5 = 0.7$

3 0

2 years ago

@jdoe<br><br> As promised. The link will be whatever.

Lady_Fox [76]

Ok, so we see in
y=a(x-h)^2+k
vertex is (h,k)
vertex is highest or lowest point
on one side, it goes up and other side it goes down

if a is positive, then it goes down then up
if a is negative, it goes up then down

we see
f(x)=2(x+3)^2+2
2 is positive
goes down then up
vertex is (-3,2)

so decreases from -infinity to -3 or ininterval
(-infinity,-3)

answer is first option

6 0

3 years ago

Whats one third of 39,900

o-na [289]

1/3 of 39,900 equals 1/3*39900

(1/3)*(39900/1)= 39900/3

39900/3= 13300

Final answer: 13,300

6 0

3 years ago

Giving brainlyist and 5 stars

sweet-ann [11.9K]

Answer:

B: Each sandwich has one third pound of ham.

7 0

3 years ago

Read 2 more answers

Jerrold ran a race that was 3 5/8 miles long. What is 3 5/8 written as a decimal?

Feliz [49]

Answer:

3.625

step by step explanation :

I just simply searched it up

8 0

3 years ago