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2 years ago

Use the function rule to complete the table. -10x+y=4 X: -2 -1 0 1 2 Y:

Mathematics

1 answer:

harina [27]2 years ago

5 0

Y = 10x + 4
x y
-2 10(-2)+4 = -16
-1 10(-1)+4 = -6
0 10(0)+4 = 4
1 10(1)+4 = 14
2 10(2)+4 = 24

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If 3x - y = 3 and -x + y = 3 then xy=___?

mamaluj [8]

First find x and y.

Solve system of equations by elimination.

3x-y=3

+(-x+y=3)

---------------

2x=6

x=3

Now plug in x into one of the equations to find y.

-3+y=3

y=6

xy=3x6=18

5 0

2 years ago

2. Flying to Kampala with a tailwind a plane averaged 158 km/h . On the return trip the plane only averaged 112 km/h while flyin

stiv31 [10]

Answer:

Speed of plane in still air = 135 km/h

Speed of wind = 23 km/h

Step-by-step explanation:

Given that:

Speed of plane with the wind = 158km/h

Speed of plane against the wind = 112km/h

Let,

x be the speed of plane

y be the speed of wind

According to given statement;

x+y = 158 Eqn 1

x-y = 112 Eqn 2

Adding Eqn 1 and 2

$x+y+x-y=158+112\\2x = 170\\\frac{2x}{2}=\frac{270}{2}\\x=135$

Putting x = 135 in Eqn 1

135+y = 158

y = 158-135

y = 23

Hence,

Speed of plane in still air = 135 km/h

Speed of wind = 23 km/h

8 0

2 years ago

(1,-6,); (9,-8) Slope Best answer =branniest

nignag [31]

Answer:-1/4

Why? Slope=rise/run and can be found with the difference of y over the difference of x
-8- -6= -2
9-1= 8
so the slope is -2/8 but you have to simplify so you get
-1/4

Hope this helps

6 0

2 years ago

What is the solution for this system of linear equations? {23x+4=y 4−2x=y

liubo4ka [24]

We can subsitute since
23x+4=y and
4-2x=y
therefor
23x+4=y=4-2x
so
23x+4=4-2x
minus 4 on both sides
23x=-2x
add 2x to both sides
25x=0
divide both sides by... uh oh
I guess x=0

sub
4-2(0)=y
4-0=y
4=y

the solution is (0,4)

3 0

3 years ago

Use patterns blocks to help fidn each of the fractions

madam [21]

Answer:1/2?

atleast that what i thought it was

4 0

2 years ago

Read 2 more answers