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3 years ago

Simplify 7x + 3y + 5x + y

Mathematics

2 answers:

OLEGan [10]3 years ago

8 0

Answer: 12x + 4y

Step-by-step explanation:

miskamm [114]3 years ago

8 0

Answer:

12x + 4y

Step-by-step explanation:

Add all the x together, and then y. Giving you (7x + 5x) + (3y + 1y) = 12x + 4y

Hope that helped

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Answer two questions about Equations AAA and BBB: \begin{aligned} A.&&\dfrac x4+1&=-3 \\\\ B.&&x+4&=-12

luda_lava [24]

The given equations are as follows

$\begin{aligned} A.&&\dfrac x4+1&=-3 \\\\ B.&&x+4&=-12 \end{aligned}$

(1) First, multiply both sides of equation A by 4, we have

$4\times\left(\frac{x}{4} +1\right)=4\times(-3)$

Then, rewrite the left-hand side of the above equation by using the distributive property, we have

$4\times\frac{x}{4}+4\times1=4(-3)$

$\Rightarrow x+4=-12$

This is the required equation B.

In this way, first use choice D: Multiply both sides by the same non-zero constant, i.e 4.

Then, apply choice A to solve the equation, i.e using the distributive property to solve the left-hand side of the equation.

(2) In the previous answer, equation B has been derived from equation A, hence, both the equations are equivalent.

As both the equations are the same, so both will have the same solution.

Yes, they have the same solution.

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3 years ago

Montraie is going to see a movie and is taking his 2 kids. Each movie ticket costs $13

Tresset [83]

cost of 4 snacks

Answer: 53

Total cost: 3.50× + 39

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3 years ago

Evaluate the expression when c= -4 and y= 3 c-5y

Dmitry_Shevchenko [17]

Answer:

-19

Step-by-step explanation:

If c = -4 and y = 3, replace c and y with their corresponding values in the expression, so that the expression will look like this: (-4) - (5 * 3).

Since multiplication comes before subtraction in PEMDAS, you would multiply 5 by 3, which gets you 15.

Now the expression is (-4) - (15). Then, you do the subtraction. -4 - 15 is equal to -19.

Does that help?

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3 years ago

Which of the following is not a type of angle a acute b obtuse c parallel d right

scZoUnD [109]

Answer:

parallel

Step-by-step explanation:

parallel describes lines

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3 years ago

Read 2 more answers

Solve the system equation for X and using the elimination method .

Kisachek [45]

Answer: 2х+5y=25= Slope = -0.800/2.000 = -0.400

x-intercept = 25/2 = 12.50000

y-intercept = 25/5 = 5

so slope form =0,400

x intercept form = 12.50000

y intercept =5

and the answer to 2x+3y=-1= Slope = 1.333/2.000 = 0.667

x-intercept = 1/2 = 0.50000

y-intercept = -1/3 = -0.33333

Step-by-step explanation: an equation of a straight line. Such an equation is usually written y=mx+b ("y=mx+c" in the UK).

"y=mx+b" is the formula of a straight line drawn on Cartesian coordinate system in which "y" is the vertical axis and "x" the horizontal axis.

In this formula :

y tells us how far up the line goes

x tells us how far along

m is the Slope or Gradient i.e. how steep the line is

b is the Y-intercept i.e. where the line crosses the Y axis

The X and Y intercepts and the Slope are called the line properties. We shall now graph the line 2x+5y-25 = 0 and calculate its properties

Notice that when x = 0 the value of y is 5/1 so this line "cuts" the y axis at y= 5.00000

y-intercept = 25/5 = 5

When y = 0 the value of x is 25/2 Our line therefore "cuts" the x axis at x=12.50000

x-intercept = 25/2 = 12.50000

Slope is defined as the change in y divided by the change in x. We note that for x=0, the value of y is 5.000 and for x=2.000, the value of y is 4.200. So, for a change of 2.000 in x (The change in x is sometimes referred to as "RUN") we get a change of 4.200 - 5.000 = -0.800 in y. (The change in y is sometimes referred to as "RISE" and the Slope is m = RISE / RUN)

Slope = -0.800/2.000 = -0.400

Geometric figure: Straight Line

Slope = -0.800/2.000 = -0.400

x-intercept = 25/2 = 12.50000

y-intercept = 25/5 = 5

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3 years ago