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Dvinal [7]
3 years ago
12

Which matrix represents the system of equations shown below? 3x - 4y = -8 4x+3y = -19 ​

Mathematics
1 answer:
Angelina_Jolie [31]3 years ago
3 0

Answer:

C

Step-by-step explanation:

if you see the questions it shows you the letter of the number as you can see there are 2 y in an algebra format C is the only one with the letter of the algebra

have a great day ahead :)

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Starting at an initial height of 364 feet, an object is projected
Lana71 [14]

Step-by-step explanation:

4.5 s, 324 ft

Explanation:

The object is projected upward with an initial velocity of

v_0 = 144 ft/sv

0

=144ft/s

The equation that describes its height at time t is

s(t) = -16t^2 + 144 ts(t)=−16t

2

+144t (1)

where t, the time, is measured in seconds.

In order to find the time it takes for the object to reach the maximum height, we must find an expression for its velocity at time t, which can be found by calculating the derivative of the position, s(t):

v(t) = s'(t) = -32t +144v(t)=s

′

(t)=−32t+144 (2)

At the maximum heigth, the vertical velocity is zero:

v(t) = 0

Substituting into the equation above, we find the corresponding time at which the object reaches the maximum height:

\begin{gathered}0=-32t+144\\t=\frac{144}{32}=4.5 s\end{gathered}

0=−32t+144

t=

32

144

=4.5s

And by substituting this value into eq.(1), we also find the maximum height:

s(t) = -16(4.5)^2+144(4.5)=324 fts(t)=−16(4.5)

2

+144(4.5)=324ft

<h3>used this way i even don't know sorry:))</h3>
7 0
2 years ago
I have the equations 8x + 3y = 20.50 and 4x + 5y = 22.50<br> How do I solve for x and y?
snow_tiger [21]
8x + 3y = 20.50
-
4x+5y=22.50
=
4x-2y=-2, so you have to divide each number by 2, then
2x-y=-1, so

-y=-1-2x /-1, y=1+2x, then replace it with one original equation like the first one for instance:
8x+3(1+2x)=20.50, then
8x+3+6x=20.50, then
14x=20.50-3
14x=17.5
x=1.25, then solve y:\
y=1+2*(1.25)
y=1+2.5
y=3.5,
So answer is x=1.25, and y=3.5

6 0
4 years ago
Which situation represents a proportional relationship between the number of laps run by each student and their time.desmond's t
mezya [45]
Desmond's times are proportional. for every 2 laps he takes 146
146 / 2 = 73
292 / 4 = 73
584 / 8 = 73

Maria's time are not proportional
150 / 2 = 75
320 / 4 = 80
580 / 6 = 96.67


3 0
4 years ago
Read 2 more answers
How to solve y=x+13 for a graph
12345 [234]
I dont know what you mean by solve but make an X Y table and plug your values in. Try X=1 X=2 X=3 and so on. also do negatives so you can see the lower quadrants.
8 0
4 years ago
Read 2 more answers
25 points ! Identify the area of the rhombus.
galben [10]

Answer:

The area of the rhombus would be 1176 inches.

Please mark brainliest. It would be appreciated

Have a great day.

Step-by-step explanation:

7 0
4 years ago
Read 2 more answers
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