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3 years ago

Find a solution to the following system of equations. –2x + 5y = 8 2x + 2y = 6

Mathematics

2 answers:

maksim [4K]3 years ago

5 0

a a a a a a a a a a a a a a a a a a a a

Anika [276]3 years ago

3 0

With multiple choice questions, I find it best to plug in on this one.
For a) x=2 and y=1 so, plug it into the equation.
1) -2(2) + 5(1) = 8 and than you check the other one
2) 2(2) + 2(1) = 6 if it works in both than that is your answer. If not than you try another choice until you get one that works in both equations.

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help me please look at picture I sent to know ..! btw show work answer all please ignore the number 5 up top on number 11

rosijanka [135]

Answer:

11) 140/8 = 17.5

12) 38/3 = 12.667

13) 114/9 = 12.667

14) 7/2 = 3.5

15) 14/9 = 1.556

Step-by-step explanation:

To solve each problem you need to multiply the numerator by the whole number:

11) 7*20 = 140

12) 2*19 = 38

13) 6*19 = 114

14) 1*7 = 7

15) 7*2 = 14

Next, you put these numbers back into their corresponding numerators and divide:

11) 140/8 = 17.5 (You can simplify this fraction to 70/4 if needed)

12) 38/3 = 12.667 (This answer is rounded to the thousandths place)

13) 114/9 = 12.667 (This answer is rounded thousandsths place)

14) 7/2 = 3.5

15) 14/9 = 1.556 (This answer is rounded thousandths place)

**These are the improper fractions written as mixed ones** :

11) 17 1/2

12) 12 2/3

13) 12 2/3

14) 3 1/2

15) 1 5/9

I hope this helps!

6 0

4 years ago

What can you learn from the Nutrition Facts panel on a packaged food item?

salantis [7]

B is the correct answer.

8 0

3 years ago

Read 2 more answers

What is the solution to the system of equations?

gtnhenbr [62]

Answer:

Can you check your equation? None of the solutions work out.

Step-by-step explanation:

4 0

3 years ago

A contractor is building a new subdivision on the outside of a city. He has started work on the first street and is planning for

sergeinik [125]

Answer:

x + y = 6

Step-by-step explanation:

Standard Form:

y - y1 = m(x - x1)

In this question, the coordinate is (1, 5) with a slope of -1 (the slope is the same as street 1 since street 2 is going to be parallel.

Insert the coordinate and slope into standard form and you'll get this:

y - 5 = -1 ( x - 1 )

y - 5 = -x + 1

y = -x + 6

y + x = 6

hope this helps.

5 0

4 years ago

A King in ancient times agreed to reward the inventor of chess with one grain of wheat on the first of the 64 squares of a chess

statuscvo [17]

Let's start by visualising this concept.

Number of grains on square:
1 2 4 8 16 ...

We can see that it starts to form a geometric sequence, with the common ratio being 2.

For the first question, we simply want the fifteenth term, so we just use the nth term geometric form:
$T_n = ar^{n - 1}$
$T_{15} = 2^{14} = 16384$

Thus, there are 16, 384 grains on the fifteenth square.

The second question begs the same process, only this time, it's a summation. Using our sum to n terms of geometric sequence, we get:
$S_n = \frac{a(r^{n} - 1)}{r - 1}$
$S_{15} = \frac{2^{15} - 1}{2 - 1}$
$S_{15} = 2^{15} - 1 = 32767$

Thus, there are 32, 767 total grains on the first 15 squares, and you should be able to work the rest from here.

6 0

3 years ago

Read 2 more answers