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Degger [83]
3 years ago
15

I WILL GIVE BRAINLIST AND 50 POINTS

Mathematics
2 answers:
algol133 years ago
8 0

Answer:

a

Step-by-step explanation:

Alisiya [41]3 years ago
7 0

Step-by-step explanation:

A proportional relationship graph would show that the points can be arranged in a line that passes through the origin.

All of the points in Graphs B, C and D cannot be connected in 1 straight line, hence they are not proportional relationships.

Only Graph A shows a proportional relationship.

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Use cramers rule to solve 4x+3y=4 -3x-y=7 show your work
Nataly_w [17]
\left\{\begin{array}{ccc}4x+3y=4\\-3x-y=7\end{array}\right\\\\D=  \left|\begin{array}{ccc}4&3\\-3&-1\end{array}\right|=(4)(-1)-(-3)(3)=-4+9=5\\\\D_x=\left|\begin{array}{ccc}4&3\\7&-1\end{array}\right|=(4)(-1)-(7)(3)=-4-21=-25\\\\D_y=\left|\begin{array}{ccc}4&4\\-3&7\end{array}\right|=(4)(7)-(-3)(4)=28+12=40\\\\x=\dfrac{D_x}{D}\Rightarrow x=\dfrac{-25}{5}=-5\\\\y=\dfrac{D_y}{D}\Rightarrow y=\dfrac{40}{5}=8
8 0
3 years ago
Which describes the graph of fx=[x]-2 on [0, 3)?
marissa [1.9K]

Answer:

Step-by-step explanation:

Find the absolute value vertex. In this case, the vertex for  

y = |x − 2 | + 1 is  ( 2 , 1 ) .

To find the  x  coordinate of the vertex, set the inside of the absolute value  

x − 2  equal to  0 . In this case,  

x − 2 = 0. x−2 = 0

Add  2  to both sides of the equation.

x = 2

Replace the variable  x  with  2  in the expression.

y = | ( 2 ) − 2 | + 1

Simplify  

| ( 2 ) − 2 | + 1 .

Simplify each term.

Subtract  2  from  2

y = | 0 | + 1

The absolute value is the distance between a number and zero. The distance between  0  and  0  is  0 .

y = 0 + 1

Add  0  and  1 .

y = 1

The absolute value vertex is  ( 2 , 1 ) . ( 2 , 1 )

8 0
3 years ago
A bus travels 90 km in 1.5 hours (with a constant speed). How far can it travel in 7.2 hours (with the same speed)?​
blondinia [14]

Answer:

distance=90km

time=1.5h

speed of the bus=distance /time

speed of the bus=90km/1.5h

speed of the bus=60km/h

therefore if 1.5h=60km/h

then 7.2h=(7.2x60)/1.5 =288km

5 0
3 years ago
Passing through (12,3)<br> perpendicular to<br> y + 3x = 4
enot [183]
Remember the formula?
m1m2=-1

3 0
3 years ago
HELP IN THIS QUESTION
Shalnov [3]
The answer is 2/9 of a gallon.
Because 2/9 x 9 (people) is 2 (gallon)
7 0
3 years ago
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