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miv72 [106K]
3 years ago
10

Solve the system of equations below by elimination. (Show your work) 4x+y=9 3x+2y=8

Mathematics
1 answer:
a_sh-v [17]3 years ago
4 0

Answer:

(2,1)

Step-by-step explanation:

1 step:  -2(4x+y=9)

             3x+2y=8

2 step: -8x-2y=-18

             3x+2y=8

3 step: -5x=-10

divide by -5 both sides

x=2

Now we solve for y

choose an equation from above and subtitute the x for 2.

3(2)+2y=8

6+2y=8

subtract 6 from both sides

2y=2

Y=1

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Addison brought 5 pounds of oranges and 7 pounds of cherries to make a fruit salad for a fund raiser. She wants to package an eq
igor_vitrenko [27]
This is how i solved this:

9+7=1616 divided by 12 = 1.3 (repeater)1.3 (repeater) = 1 3/10Addison should put 1 3/10 pounds of salad in each container.
7 0
3 years ago
Ab=6cm Ac=12 calculate the lenght of cd
Alchen [17]

This problem involves the uses of the Pythagorean Theorem as well as the use of Sine.

To start we need to identify what we know and what we don't know. We know that there are two triangles. We are given 2 sides lengths and an angle in one and only an angle in the other. They share one side meaning when we are given 2 sides in one triangle it will be easy to get the third side. What we don't know is the side length of CB DB or CD. We need to find CB in order to find CD.

<em>Pythagorean Theorem for side length CB:</em>

12^2-6^2=√108

√108=10.4 (average)

So CB is equal to 10.4

<em>Sine Calculation for side length CD:</em>

Since we have angle 56* we will use the length we found which will be the opposite side from the angle and then input x for our hypotenuse CD in order to solve.

sin 56* = 10.4/x

sin 56* × x = 10.4/x × x

sin 56*x = 10.4

/sin 56*      /sin 56*

x = 12.544....

or 12.6 (average)

So, to conclude, our answer for CD is 12.6cm.

Hope I helped!

7 0
3 years ago
Read 2 more answers
The perimeters of square region S and rectangular region R are equal. If the sides of R are in the ratio 2 : 3, what is the rati
Ksivusya [100]
<h2>Answer:</h2>

The ratio of the area of region R to the area of region S is:

                    \dfrac{24}{25}

<h2>Step-by-step explanation:</h2>

The sides of R are in the ratio : 2:3

Let the length of R be: 2x

and the width of R be: 3x

i.e. The perimeter of R is given by:

Perimeter\ of\ R=2(2x+3x)

( Since, the perimeter of a rectangle with length L and breadth or width B is given by:

Perimeter=2(L+B) )

Hence, we get:

Perimeter\ of\ R=2(5x)

i.e.

Perimeter\ of\ R=10x

Also, let " s " denote the side of the square region.

We know that the perimeter of a square with side " s " is given by:

\text{Perimeter\ of\ square}=4s

Now, it is given that:

The perimeters of square region S and rectangular region R are equal.

i.e.

4s=10x\\\\i.e.\\\\s=\dfrac{10x}{4}\\\\s=\dfrac{5x}{2}

Now, we know that the area of a square is given by:

\text{Area\ of\ square}=s^2

and

\text{Area\ of\ Rectangle}=L\times B

Hence, we get:

\text{Area\ of\ square}=(\dfrac{5x}{2})^2=\dfrac{25x^2}{4}

and

\text{Area\ of\ Rectangle}=2x\times 3x

i.e.

\text{Area\ of\ Rectangle}=6x^2

Hence,

Ratio of the area of region R to the area of region S is:

=\dfrac{6x^2}{\dfrac{25x^2}{4}}\\\\=\dfrac{6x^2\times 4}{25x^2}\\\\=\dfrac{24}{25}

6 0
4 years ago
Read 2 more answers
Dinner was $48. Find the total cost including 6% tax and 29% tip
lara [203]

Answer:

83

Step-by-step explanation:

tax plus tip is 35%

35% of 100 is 35

48 + 35 = 83

3 0
3 years ago
What is the product in lowest terms? 1/6 • 5/7
Pani-rosa [81]

Multiply the numerator together and the denominators together.

1 x 5 / 6 . 7 = 5/42

42 is not a multiple of 5 so the answer is already in the lowest term.

The answer is 5/42

4 0
3 years ago
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