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2 years ago

??????????????????????????

Mathematics

1 answer:

Zinaida [17]2 years ago

5 0

Answer:

Step-by-step explanation:

3(2) + 4(-2) = -2 2(2)-4(-2) = -8

6 - 8 = -2 4 + 8 = -8

Correct Incorrect

3(6) + 4(-5) = -2 2(6) - 4(-5) = -8

18 - 20 = -2 12 + 20 = -8

Correct incorrect

3(4) + 4(4) = -2

12 + 8 = -2

incorrect

3(-2) + 4(1) =-2 2(-2) - 4(1) = -8

-6 + 4 = -2 -4 - 4 = -8

Correct Correct

Best way is process of elimination

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Z-2w=2 please help me solve , studying for praxis

RUDIKE [14]

Answer:

Z(2w-2)=24

Simple and best practice solution for Z(2w-2)=24 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

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2 years ago

Andrea, Justin, and Virginia went to an office supply store. Andrea bought 6 pencils, 7 markers, and 8 erasers. Her total was $1

olga2289 [7]

Answer:

$x=0.25\,,\,y=1.75\,,\,z=0.25$

Step-by-step explanation:

Let $x,y,z$ denotes number of pencils, markers, erasers respectively.

For Andrea:

$6x+7y+8z=15.75\,\,\,(i)$

For Justin:

$6x+8y+5z=16.75\,\,\,(ii)$

For Virginia:

$5x+5y+7z=11.75\,\,\,(iii)$

On subtracting equations (i) and (ii), we get

$(6x+7y+8z)-(6x+8y+5z)=15.75-16.75\\-y+3z=-1\\y-3z=1\\y=1+3z$

Put $y=1+3z$ in equation (i)

$6x+7(1+3z)+8z=15.75\\6x+29z=8.75\,\,\,(iv)$

Put $y=1+3z$ in equation (iii)

$5x+5(1+3z)+7z=11.75\\5x+22z=6.75\,\,\,(v)$

Multiply equation (iv) by 5 and equation (v) by 6 and then subtract both the equations.

$5(6x+29z)-6(5x+22z)=5(8.75)-6(6.75)\\13z=3.25\\z=\frac{3.25}{13}=0.25$

Put $z=0.25$ in equation $y=1+3z$

$y=1+3(0.25)=1.75$

Put $y=1.75\,,\,z=0.25$ in equation (i)

$6x+7(1.75)+8(0.25)=15.75\\6x+12.25+2=15.75\\6x=1.5\\x=0.25$

8 0

3 years ago

(-2.66) multiplied by (18.44)

Stells [14]

Answer:

I think the answer you're looking for is -49.05

(longer version: -49.0504)

4 0

3 years ago

THE PRODUCT (x-10)(x+2) is equivalent to

marissa [1.9K]

You can use the FOIL method when you have two binomials. First, outer, inner, last

7 0

2 years ago

there ar 2.54 centimeters in 1 inch. how many cantimeter are in 1 foot? in 1 yard explain you reasoning

stellarik [79]

2.54 * 12=30.48, so 30.48 in one foot, then multiply that by three for a yard, so for a yard it is 91.44 .

4 0

2 years ago