MATHEMATICS HIGH SCHOOL

6x - 5y= 70
7x + 2y=66

I need a answer in words step by step please help!!

Answers

Answer 1

Answer:

Answer:

x = 10

y = -2

Step-by-step explanation:

Elimination method:

6x - 5y = 70 -----------------(I)

7x + 2y = 66 -----------------(II)

Multiply equation (I) by 2 and equation (II) by 5 and add. So, y will be eliminated and you can now find the value of x

(I)*2 12x - 10y = 140

(II)*5 35x + 10y = 330 {Now add}

47x = 470

x = 470/47

x = 10

Plugin x = 10 in equation (II)

7*10 + 2y = 66

70 + 2y = 66

Subtract 70 from both sides

2y = 66 - 70

2y = -4

Divide both sides by 2

y = -4/2

y = - 2

Answer 2

Answer: (10,-2) or x=10 , y=-2

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Answers

$Answer:4)\n\nbecause\n(2;\ 3)\to x=2\ and\ y=3\n(2;\ 4)\to x=2\ and\ y=4\n\nfor\ this\ same\$

A doctor prescribes a 100-mg antibiotic tablet to be taken every eight hours. Just before each tablet is taken, 20% of the drug remains in the body. (a) How much of the drug is in the body just after the sec- ond tablet is taken

Answers

Answer:

120 mg

Step-by-step explanation:

20% of 100 is 20 so that would be 20mg plus the 100mg they just took

100+20=120mg

i hope this helps you!

HELP! 10 POINTS!! :((

Answers

Answer below.

1. 2

2. 17

3. 16

4. 4

5. 2

6. 8

7. 8

8. 10

The answer is 6 hope this helps

Which of the following are prime factorizations of the number 100? Check all that apply.A. 2, 5, 10
B. 5, 10, 2
C. 5, 2, 5, 2
D. 5, 2, 2, 5

Answers

Answer:

Use the factor tree to find the prime factorization of 100.

A factor tree of 100. 100 branches to 10 and 10. Both tens branch to 2 and 5.

What is the prime factorization of 100?

2 × 5

2 × 2 × 5 × 5

2 × 5 × 10

10 × 10

Step-by-step explanation:

smh.. people really keep getting it wrong and its B i took the test

Its C and D? I provided a picture showing how I did it. You just create a factor tree and circle all the prime numbers. Than you got your answer.

A local bookstore finds that each day approximately 20% of their sales are nonfiction books if they sell 425 books one day how many of those books are nonfiction?

Answers

Steps:
1. Do a proportion
X/425= 20/100
2. Do 425 times 20 which equals 8,500
3. Do 8,500 divided by 100 which equals 85
4. Your answer is: 85

If ∠o = 125°, what does ∠z equal in this figure?(uploaded img)

A. 125°
B. 35°
C. 180°
D. 55°

Answers

By the concepts of transversal, vertically opposite angles, and pair of interior alternate angles measure of angle z is A. 125°.

What is a transversal?

We know when a transversal intersects two parallel lines at two distinct points,

Two pairs of interior and alternate angles are formed such that the measure of interior angles are same and the measure of alternate angles is also the same.

Given, m∠o is 125°.

We know vertically opposite angles are equal hence m∠q is also 125°.

We also know that the pair of interior angles are equal therefore m∠x is also 125° and again vertically opposite angle z is 125°.

learn more about transversal here :

brainly.com/question/28983284

#SPJ5

Answer:

125

Step-by-step explanation:

o=q

q=x

then x=z =125