MATHEMATICS HIGH SCHOOL

Find value of x and y

4.)2x-3y=-15
x=4y

Answers

Answer 1
Answer: \left\{\begin{array}{ccc}2x-3y=-15\nx=4y\end{array}\right\n\nsubstitute\n\n2\cdot4y-3y=-15\n8y-3y=-15\n5y=-15\ \ \ \ \ |both\ sides\ :5\ny=-3\n\nx=4\cdot(-3)=-12\n\nSolution:x=-12\ and\ y=-3.
Answer 2
Answer: 2x - 3y = -15
x = 4y
substitute x frm eq2 to eq1
2 (4y) - 3y = -15
8y - 3y = -15
5y = - 15
y = -3
substitute y in eq2
x = 4(-3)
x = -12
y = -3 , x = -12

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Not possible no real solutions

Describe how math in middle school differs from
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Answers

high school math classes are more advanced than middle school math classes
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How do you write 8000 in roman nos?

Answers

Final answer:

8000 in Roman nos can be written as 'VIII' with a line above the numerals, to indicate multiplication by 1000.

Explanation:

To write 8000 in Roman nos, you should understand that the Roman numeral system uses symbols to represent numbers. For example, the symbol 'I' stands for 1, 'V' stands for 5, 'X' stands for 10, and so forth. However, the Roman numeral system has no standard numeral for 8000. The Romans commonly only used numerals up to 1000 (M). For higher numbers, they sometimes used a line over a number to indicate multiplication by 1000. Thus, 8000 can be represented as 'VIII' with a line over it.

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brainly.com/question/32668493

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Find the sum of the measure of the exterior angle of the convex polygon

Answers


No matter what type of polygon you have, the sum of the exterior angles is ALWAYS equal to 360°. If you are working with a regular polygon, you can determine the size of EACH exterior angle by simply dividing the sum, 360, by the number of angles.

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Answers

This is what is considered an arithmetic sequence because the common difference between term is 4. So one way you could write each term is the first term minus the common difference times the number times one. So assuming that the first number in the sequence is 70, you can write the expression as 70-4(n-1), where 70 is the first term, 4 is the common difference and n is the nth-numbered term. Simplify this expression and it is now, 74-4n. So you were close, but you can't necessarily add a specific term each time to find the next term in the sequence because it is decreasing 

I have class in a half an hour and I still haven't solved all of the hw questions... please help guys I'll give 90 points and brainliest for the first correct answer with brief explanation: thank you SOOOOOOOOOO much!Given: E, F, Q, D∈k(O),O ∈ ED, m∠DFQ = 10°, measure of arc EF = 28° Find: Angles of △EFQ

Answers

Answer:

Angles of △EFQ:

m<EFQ = 100°

m<EQF = 14°

m<FEQ = 66°

Step-by-step explanation:

ED is the diameter of the circle O

so m<EFD = 1/2 (180) = 90°

Given m∠DFQ = 10°

△EFQ

m<EFQ = m<EFD + m∠DFQ = 10° + 90° = 100°

arc EF = 28°,

so m<EQF = 1/2 (28) = 14°

m<FEQ = 180 - ( 100° +  14°) = 66°

Answer:

m<EFQ = 100°

m<EQF = 14°

m<FEQ = 66°
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