Please answer this question

The altitude of a a in feet of a plain t minutes after lift off is given by a= 3400t + 600 how many minutes after lift off is th

mart [117]

The plane will be at an altitude of 21,000 feet, 6 minutes after lift off.

For any equation, x = y + a, if we are given the value of any one of the variables, that is either x or y, we can find the value of the other.

Here, we are given an equation

a = 3400t + 600

where a = altitude of the plane in feet

and t = time (in minutes) passed after the plane's lift off

If the altitude of the plane is 21,000 feet

⇒ a = 21,000

Substituting this in the equation, we get

21,000 = 3400t + 600

21,000 - 600 = 3400t

20,400 = 3400t

3400t = 20,400

t = 20,400/ 3,400

t = 204/ 34

t = 6

Thus, the plane will be at an altitude of 21,000 feet, 6 minutes after lift off.

Learn more about Linear equations here-

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8 0

2 years ago

Which is the correct answer?

Ksivusya [100]

Answer:

B

Step-by-step explanation:

The equation of a parabola in vertex form is

y = a(x - h)² + k

where (h, k) are the coordinates of the vertex and a is a multiplier

here (h, k) = (3, - 20), thus

y = a(x - 3)² - 20

To find a substitute (7, 12) into the equation

12 = a(7 - 3)² - 20

12 = 16a - 20 ( add 20 to both sides )

32 = 16a ( divide both sides by 16 )

2 = a, thus

y = 2(x - 3)² - 20 ← expand using FOIL

y = 2(x² - 6x + 9) - 20 ← distribute and simplify

y = 2x² - 12x + 18 - 20

y = 2x² - 12x - 2 → B

7 0

3 years ago

five whole numbers are written in order 4 6 x y 10 the mean and median are the same what are x and y values

AlexFokin [52]

Answer:

$x,y=7,8$

Step-by-step explanation:

4 6 x y 10

As x is the median number of this sequence, we know that the mean would be equal to this.

The mean is defined as:

$\frac{4+6+x+y+10}{5}=\frac{20+x+y}{5}$

So we can say that:

$\frac{20+x+y}{5}=x$

Rearranging this, we get:

$\frac{20+x+y}{5}=x\\20+x+y=5x\\20+y=4x$

As we know that:

$x, y \in \mathbb{R}\\y\geq x\\x,y \in \{6 \leq x,y \leq10 \}$

So we can substitute in values and see which fit the equality:

Subbing in x as 6 gives us,

$4(6)=20+y\\24=20+y\\y=4$

However, y must be bigger than x and must be between 6 and 10, so this is incorrect.

Subbing in x as 7 gives us,

$4(7)=20+y\\28=20+y\\8=y$

As 8 is bigger than 7, and is in between 6 and 10, this means all of our inequalities have been met and we have the correct answer.

4 0

3 years ago

Harper knows he is 50 yards from the school. The map on his phone shows that the school is 3/4 inch from his current location. I

prisoha [69]

Answer:

150 yards

Step-by-step explanation:

50 yards=3/4inch

xyards=3inches

50/4=12.5

4*3=12

12.5*12=150

150 yards

7 0

3 years ago

The presence of a midpoint will result in what type of segments?

MissTica

Step-by-step explanation:

The presence of a midpoint will result in congruent segment.

3 0

3 years ago