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3 years ago

11

I am beggging you..I don't understand how to do this so can someone please write the equations for the problems. You don't have

to solve them just write the equation

1 answer:

Natasha_Volkova [10]3 years ago

4 0

12) The answer is 2 months

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7x + 2y = -1<br> 3x – 4y = 19

jeka94

Answer: Y = - 4 & x = 1

Step-by-step explanation:

Systems of linear equations: We will solve this using substitution but you can use 2 more ways.

7x + 2y = -1

2x - 4y = 19

Leave X alone first: -------------------

10x - 2y = 18

10x/10 = 18 + 2y/10

x = 9/5 + y/5

Solve for y:

7(9/5 + y/5) + 2y = -1

63/5 + 7y/5 + 2y - 1

63/5 + 7y/5 = 10y/5 = -1

63/5 + 17y/5 = -1 (-5/5)

17y/5 = -68/5 (cancel the 5)

y = -68/17

y = - 4 (Your Answer)

7x + 2(- 4) = -1

7x + (-8) = -1

7x = 7

x = 1

CHECK=

7(1) + 2(-4) = -1

7+ (-8) = -1.

-1=-1

7 0

3 years ago

Read 2 more answers

I need help with this

cupoosta [38]

Answer:

x=45

Step-by-step explanation:

This is a triangle so it interior degrees will add up to 180.

W

Since Line AC is tangent to Circle O at point c, Point C measures 90 degrees.

We can find OAC by using the triangle interior theorem,

$45 + 90 + x = 180$

$135 + x = 180$

$x = 45$

3 0

3 years ago

Use the digits 1-7 to crest a seven digit number that can be rounded off to 6,300,000

Ne4ueva [31]

6,277,765 rounds up to 6,300,00

7 0

3 years ago

What is 3/4 of 16/21? worked out please

timofeeve [1]

Of means multiplication

So

$\frac{3}{4} \sf{of} \frac{16}{21} = \frac{3}{4} \times \frac{16}{21}$

And then simplify the numerator ad denominator

= $\frac{3 \times 16}{4 \times 21} = \frac{\ 1 \times 16}{4 \times 7}$

And simplify the numerator and denominator again

= $\frac{\ 1 \times 16}{4 \times 7} = \frac{\ 1 \times 4}{1 \times 7}$

And we are finally left with the answer which is $\frac{4}{7}$

5 0

3 years ago

The resting heart rate of an adult is usually about 60 beats per minute. Use your completed table to find approximately how many

Dvinal [7]

60x=1,000,000
----- ---------------
60 60
X=16,666 2/3 or
X=16,666.6667 it would take approximately 16,667 minutes for the average resting heart to beat 1,000,000 times.

3 0

3 years ago