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2 years ago

Lindsey bought supplies for a class project and brought the receipt to school. The 6 items cost:

Mathematics

2 answers:

DochEvi [55]2 years ago

5 0

Answer:

Step-by-step explanation:

$5 appeared more in the prices

alexira [117]2 years ago

5 0

Answer:

5 dollars

Step-by-step explanation:

cuz I just know

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NASA launches a rocket at t = 0 seconds. Its height, in meters above sea-level, as a function of time is given by h ( t ) = − 4.

Oliga [24]

Answer:

$\displaystyle 1)48.2 \: \: \text{sec}$

$\rm \displaystyle 2)3021.6 \: m$

Step-by-step explanation:

<h3>Question-1:</h3>

so when flash down occurs the rocket will be in the ground in other words the elevation(height) from ground level will be 0 therefore,

to figure out the time of flash down we can set h(t) to 0 by doing so we obtain:

$\displaystyle - 4.9 {t}^{2} + 229t + 346 = 0$

to solve the equation can consider the quadratic formula given by

$\displaystyle x = \frac{ - b \pm \sqrt{ {b}^{2} - 4 ac} }{2a}$

so let our a,b and c be -4.9,229 and 346 Thus substitute:

$\rm\displaystyle t = \frac{ - (229) \pm \sqrt{ {229}^{2} - 4.( - 4.9)(346)} }{2.( - 4.9)}$

remove parentheses:

$\rm\displaystyle t = \frac{ - 229 \pm \sqrt{ {229}^{2} - 4.( - 4.9)(346)} }{2.( - 4.9)}$

simplify square:

$\rm\displaystyle t = \frac{ - 229 \pm \sqrt{ 52441- 4( - 4.9)(346)} }{2.( - 4.9)}$

simplify multiplication:

$\rm\displaystyle t = \frac{ - 229 \pm \sqrt{ 52441- 6781.6} }{ - 9.8}$

simplify Substraction:

$\rm\displaystyle t = \frac{ - 229 \pm \sqrt{ 45659.4} }{ - 9.8}$

by simplifying we acquire:

$\displaystyle t = 48.2 \: \: \: \text{and} \quad - 1.5$

since time can't be negative

$\displaystyle t = 48.2$

hence,

at 48.2 seconds splashdown occurs

<h3>Question-2:</h3>

to figure out the maximum height we have to figure out the maximum Time first in that case the following formula can be considered

$\displaystyle x _{ \text{max}} = \frac{ - b}{2a}$

let a and b be -4.9 and 229 respectively thus substitute:

$\displaystyle t _{ \text{max}} = \frac{ - 229}{2( - 4.9)}$

simplify which yields:

$\displaystyle t _{ \text{max}} = 23.4$

now plug in the maximum t to the function:

$\rm \displaystyle h(23.4)- 4.9 {(23.4)}^{2} + 229(23.4)+ 346$

simplify:

$\rm \displaystyle h(23.4) = 3021.6$

hence,

about 3021.6 meters high above sea-level the rocket gets at its peak?

5 0

2 years ago

7. Two rectangles were used to form the following figure. The dimensions of both rectangles have been provided to the nearest ha

Irina-Kira [14]

Answer:

Step-by-step explanation:

edmentum

5 0

3 years ago

Convert fraction no. 2/7 to percentage

alina1380 [7]

2/7 ≈ 0.2857
To determine percentage, move decimal 2 places to the right. ≈ 28.57%

3 0

2 years ago

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AGHHHH MATH IS EVIL help ma please

VLD [36.1K]

Answer:

{ 6, 9, 16, 18 }

Step-by-step explanation:

To find the range substitute the values of x from the domain into the equation for y, that is

x = - 3 : y = - 3 + 9 = 6

x = 0 : y = 0 + 9 = 9

x = 7 : y = 7 + 9 = 16

x = 9 : y = 9 + 9 = 18

The y values are the range of the relation, that is

y ∈ { 6, 9, 16, 18 }

8 0

3 years ago

in slope intercept form, what is the equation of the line having a slope of 2 and passing through the point (6,24)?

Yanka [14]

Answer: y = 2x + 12

Explanation: The slope-intercept form is y = mx + b, where m is slope and b is the y-intercept. Substituting 2 for m, 6 for x, and 24 for y, we have 24 = 2(6) + b. Simplifying, we get that b = 12, so the equation is y = 2x + 12.

4 0

2 years ago

Read 2 more answers