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3 years ago

How to solve 3x+y=6 and y=-3 using substation method

Mathematics

1 answer:

mafiozo [28]3 years ago

7 0

Answer:

x=3

Step-by-step explanation:

since they give you y this is a very simple problem

simply replace y with -3 and get

3x+(-3)=6

adding a negative number is the same as subtracting a positive number

3x-3=6

add 3 on both sides

3x=9

divide by 3 on both sides

x=3

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At a pizza shop you can choose thick or thin crust, red or white sauce, and toppings of pepperoni, cheese, or vegetarian. How ma

BartSMP [9]

Answer: there is 4 options.

Step-by-step explanation:

there is 2 crusts, 2 sauces, and 3 toppings. he doesn't want pepperoni or white sauce so now there is

2 crusts, 1 sauce, and 2 toppings.

2 times 1 times 2 = 4.

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3 years ago

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An investment plan that guarantees payments at regular intervals after retirement

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4 years ago

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The area of the rectangle is 49 square units.

Ilia_Sergeevich [38]

Answer:

$\boxed{70 \ \text{units}^{2}}$

Step-by-step explanation:

I assume that the polygon is made up of a rectangle and two triangles. Thus, the area of the polygon is the area of the triangles and the rectangle.

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$\text{Area of polygon} = \text{Area of rectangle} + \text{Area of triangle}_{1} } + \text{Area of triangle}_{2}$

➡ $\text{Area of polygon}= 49 + 7 + 14$

➡ ${\bold{Area \ of\ polygon = 49 + 21 = \underline{70 \ units}^{2}}$

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2 years ago

Four times the larger of two numbers is equal to seven times the smaller. The sum of the number is 22. Fine the number

GenaCL600 [577]

4y=7x
The sum of the numbers is 22
so, x+y=22
x=(22-y)
by substitute (22-y) for x in the first equation.

6 0

3 years ago

Helpp meeee i don't understand constant of proportionality (don't put pictures i can't see).

Vikentia [17]

Answer:

A) 1/5

Step-by-step explanation:

Points on the graph: (10, 2) and (20, 4)

Slope:

m=(y2-y1)/(x2-x1)

m=(4-2)/(20-10)

m= 2/10

m = 1/5

8 0

3 years ago