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3 years ago

Problems in the picture

Mathematics

2 answers:

Zepler [3.9K]3 years ago

7 0

hope it helps you!!!!!!!!!!

poizon [28]3 years ago

7 0

-6x + 8y = -6

7x -10y = 9

Let's eliminate the Y values by multiplying each equation by a number to make the coefficients of Y opposite.

-6x + 8y = -6 x 5 = -30x +40y = -30

7x -40y = 9 x 4 = 28x - 40y =36

Now add the two equations together:

-30x + 28x = -2x

40y +-40y = 0

-30 + 36 = 6

Now you have:

-2x = 6

Divide both sides by -2:

x = 6 / -2

x = -3

The answer is -3

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Twice the difference of a number + -3 is 4 find the number

NNADVOKAT [17]

Answer:

The number is 5

Step-by-step explanation:

If we need to find the hidden number, Which for simplicity's sake we will denote as "n", lets first write out the equation.

"2 x [n + (-3)] = 4"

We can work through this problem backwards. if we need two times the sum of "n" and (-3) to get to 4, the only number that can be multiplied by 2 to get a product of 4 is 2, so "n" + (-3) must equal 2. so, From here, we can figure out that since 5 + (-3) equals 2, "n" Must equal 5. so, if we plug in 5 for "n" the equation looks like this:

"2 x [5 + (-3)] = 4"

So, since the equation makes sense, the answer is, "n = 5"

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3 years ago

An artist has completed of a painting in 2 weeks. At what rate is she working?

GenaCL600 [577]

Im not sure but it could be 1/14

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3 years ago

20 points!! Solve this system of lineal equations.separate the x- and y- values with a comma

Zielflug [23.3K]

Solve the following system:{12 x = 54 - 6 y | (equation 1)-17 x = -6 y - 62 | (equation 2)
Express the system in standard form:{12 x + 6 y = 54 | (equation 1)-(17 x) + 6 y = -62 | (equation 2)
Swap equation 1 with equation 2:{-(17 x) + 6 y = -62 | (equation 1)12 x + 6 y = 54 | (equation 2)
Add 12/17 × (equation 1) to equation 2:{-(17 x) + 6 y = -62 | (equation 1)0 x+(174 y)/17 = 174/17 | (equation 2)
Multiply equation 2 by 17/174:{-(17 x) + 6 y = -62 | (equation 1)0 x+y = 1 | (equation 2)
Subtract 6 × (equation 2) from equation 1:{-(17 x)+0 y = -68 | (equation 1)0 x+y = 1 | (equation 2)
Divide equation 1 by -17:{x+0 y = 4 | (equation 1)0 x+y = 1 | (equation 2)
Collect results:Answer: {x = 4 {y = 1

Please note the { are supposed to span over both equations but it interfaces doesn't allow it. Please see attachment for clarification.

7 0

3 years ago

Mrs. Carter baked 100 muffins for a bake sale. The muffins were sold in packages of 2. There were 12 muffins left. Write an equa

Sindrei [870]

<u>Answer:</u>

2n + 12 = 100 (Equation)
2n = 88 (Solving)
n = 44 people bought muffins at the bake sale. (Solving)

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

100 muffins, and 2 in each package. Therefore, there are 50 packages. However, in the end, there are 12 left, so there must have been 6 packages left.

5 0

3 years ago

Read 2 more answers

Mhanifa please help. Look at the picture attached. I will mark brainliest

frozen [14]

Answer:

tangent = opposite leg / adjacent leg
tan ∠F = DE/ EF
tan ∠F = 24/7

<u>Option D</u>

Sine and cosine are same for complementary angles.

Complementary of 67° is 90° - 67° = 23°.
sine 67° = cosine 23°

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3 years ago