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3 years ago

7.

Mathematics

1 answer:

Alexxx [7]3 years ago

4 0

Answer:

x = 3

Step-by-step explanation:

Given the 2 equations

x + y = 3 → (1)

2x - y = 6 → (2)

Adding the 2 equations term by term eliminates the y- term, that is

3x = 9 ( divide both sides by 3 )

x = 3

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How many solutions does the following equation have

Dmitry [639]

-3x-2x+12x+5x=-9
-5x+12x+5x=-9
-5x+17x=-9
-12x=-9
x=-9+12
×=-3

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4 years ago

Use the system of equations to answer the question. <br> 2x+3y=8<br> x-y=5

Digiron [165]

Answer:

x=5+y

2(5+y)+3y=8

10+2y+3y=8

2y+3y=8-10

5y= -2

y= -2/5

x-(-2/5)=5

x+2/5=5

x=5-2/5

x=23/5

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3 years ago

Solve the equation. 5(x + 4) = 70 18 14 –6 10

skelet666 [1.2K]

Assignment: $\bold{Solve \ Equation: \ 5\left(x+4\right)=70}$

<><><><><>

Answer: $\boxed{\bold{x=10}}$

<><><><><>

Explanation: $\downarrow\downarrow\downarrow$

<><><><><>

[ Step One ] Divide Both Sides By 5

$\bold{\frac{5\left(x+4\right)}{5}=\frac{70}{5}}$

[ Step Two ] Simplify

$\bold{x+4=14}$

[ Step Three ] Subtract 4 From Both Sides

$\bold{x+4-4=14-4}$

[ Step Four ] Simplify

$\bold{x=10}$

<><><><><><><>

$\bold{\rightarrow Mordancy \leftarrow}$

6 0

3 years ago

2) Select one of your sides.

svlad2 [7]

Answer:

Step-by-step explanation:

nachos=3 =100%

1.5=50%

0.50=25%

0.25=12.5%

4 0

3 years ago

Can you Afford to Enlarge this?You each want to have a 3" X 5' picture ofprinted so that you canput it on your dartboard. It cos

Marizza181 [45]

Given:

$\text{ Dimension = 3}\times5$

Sol:

Area of picture is:

$\begin{gathered} =\text{ length}\times\text{ Width} \\ \\ =15 \end{gathered}$

If the cost $10 per square inch then price of 15 square inch is:

$\begin{gathered} =15\times10 \\ \\ =150 \end{gathered}$

If the quadruple of dimension that mean:

$\begin{gathered} \text{ l ength = 4 length} \\ \\ Width\text{ = 4 width} \end{gathered}$

So area is:

$\begin{gathered} A=4\text{ length}\times4\text{ Width} \\ \\ A=4(15) \\ \\ A=60 \end{gathered}$

So price is:

$\begin{gathered} =60\times10 \\ \\ =600 \end{gathered}$

3 0

1 year ago