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cestrela7 [59]
3 years ago
5

Follow the directions to solve the system of equations by elimination. 8x + 7y = 39 4x – 14y = –68 Multiply the first equation t

o enable the elimination of the y-term. Add the equations to eliminate the y-terms. Solve the new equation for the x-value. Substitute the x-value back into either original equation to find the y-value. Check the solution. The solution to the system of equations is
Mathematics
2 answers:
Viefleur [7K]3 years ago
10 0
(1/2 ,5) hope this helped
PolarNik [594]3 years ago
5 0

Answer:

1/2,5

Step-by-step explanation:

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Simplify 24 ÷ (-2)(3) + 7Simplify 24 ÷ (-2)(3) + 7
Mnenie [13.5K]

Solving the expression 24\div (-2)(3) + 7 we get -29

Step-by-step explanation:

We need to simplify 24\div (-2)(3) + 7

Solving:

24\div (-2)(3) + 7

Using DMAS rule

=24\div(-2)*(3)+ 7

=-12*3+ 7

=-36+7

=-29

So, solving the expression 24\div (-2)(3) + 7 we get -29

Keywords: Solving the expression

Learn more about Solving the expression at:

  • brainly.com/question/5147732
  • brainly.com/question/2386054
  • brainly.com/question/11229113

#learnwithBrainly

7 0
3 years ago
Jon's coin collection consists of quarters, dimes and nickels. If the ratio of quarters to dimes is 5:2, and the ratio of dimes
Margarita [4]

Answer:

The ratio of quarters to nickels is:

  • <u>15:8</u>

Step-by-step explanation:

To solve the exercise, you must first consider how big is the ratio of each one to the other, when it is mentioned that the ratio of quarters to dimes is 5:2 it means that for every 5 quarters, Jon has 2 dimes, for the more quarters there are with respect to the dimes, we simply divide the larger value by the smaller:

  • 5/2 = 2.5

Thus, we know that there are 2.5 more quarters than dimes. Now the following proportion: the ratio of dimes to nickels is 3:4, which means that for every 3 dimes there are 4 nickels, as the nickels are greater in quantity, we are going to see how many times they are greater in proportion than the dimes making again a division of the major over the minor:

  • 4/3 = 1.33333333333 (<em>we are going to use the fractional number so as not to lose decimals</em>).

As we can see, the nickels are a little more than 1 with respect to the dimes, now we are going to create two formulas with those values:

  • <em>q = 2.5d </em>
  • <em>n = 4/3 d</em>

Where:

  • q = quarters
  • d = dimes
  • n = nickels

As you see. We only express the calculated proportions, at first glance you can identify that the number of quarters is greater, but to know how much greater with respect to nickels we are going to divide the two values ​​that accompany "d" in the formulas:

  • <u>2.5 / (4/3) = 15/8</u>

If we express it in ratio as it is in the exercise, we obtain:

  • <u>15:8</u>

So, <u>15:8 is the ratio of quarters to nickels</u>, <em>which means that for every 15 quarters, jon has 8 nickels.</em>

8 0
3 years ago
If sin α=(12/13), and cos α=(5/13), then tan α = ?
Olin [163]
Sin α  =  12/13             opposite/hypothenue
cos α  =  5/13              adjacent/hypothenue
tan α  =  12/5                opposite/adjacent
4 0
3 years ago
A card is drawn from a standard 52-card deck. What is the probability that the card is a red 8, given that the card is an 8?
crimeas [40]
<span>probability that the card is a red 8
=
2 out of 52 or 1 out of 26

hope it helps</span>
8 0
3 years ago
Read 2 more answers
Select the correct answer<br> What is the sum of -6 4/5 and 6 4/5?
forsale [732]

Answer: 0

Step-by-step explanation: -6.80 + 6.80

Negative numbers act as subtracting

5 0
3 years ago
Read 2 more answers
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