MATHEMATICS HIGH SCHOOL

3. a. Simplify (2x + y) (x-7)
b. Find the truth set of 2x-3 +3 = -1

Answers

Answer 1

Answer:

Answer: b. X=-1/2

Step-by-step explanation:

2x-3+3=-1-3 and +3 cancel each other

2x=-1 both sides divided by 2

X=-1/2

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Paul drove for one and a half hours at 65 mph before he realized he had forgotten his wallet. How far was he from home?

Answers

He drove for one and half hours = 1 1/2 = 1.5 hours.

Speed = 65 miles per hour.

Distance = Speed * Time

Distance = 65 miles/hour * 1.5 hours

Distance = 97.5 miles

So Paul was 97.5 miles from home.

What does n + 4n- 22=5 k equal?

Answers

5n-22=5

5n=5+22

5n=27

n=27 divide 5

N=27/5 or N=5.4

Which of the following numbers is the smallest? Your answer is the letter in front of the smallest number.$\bullet$ A. $14.45001$ rounded to the nearest tenth.

$\bullet$ B. $14.54999$ rounded to the nearest tenth.

$\bullet$ C. $14.44999$ rounded to the nearest tenth.

$\bullet$ D. $14.55001$ rounded to the nearest tenth.

Answers

The answer to this question is C

Solve the system of equations.What is x and y

−2x+15y=−24
2x+9y=24

Answers

−2x+15y=−24

2x+9y=24

Add the two equations together.

-2x +2x = 0

15y + 9y = 24y

-24+24 = 0

The two equations when added become:

24y = 0

Solve for y:

divide both sides by 24:

y = 0/24 = 0

The value of Y is 0

Now replace Y in one of the equations and solve for x:

2x+9(0) = 24

2x + 0 = 24

2x = 24

Divide both sides by 2:

x = 24/2

x = 12.

The value of x is 12

The solution is (12,0)

Answer:

The solution is ( x , y ) = ( 12 , 0 )

Step-by-step explanation:

[ Refer to the attachment ]

What is the product? 5/3*10/3a. 23/6
b. -5/7
c. -7/5
d. 5/3

Simplify the expression. (8 + 7a) + 4
a. 12 + 11a
b. 19a
c. 8 + 11a
d. 12 + 7a

Answers

$(5)/(3) * (10)/(3) \n \n (5 * 10)/(3 * 3) \n \n (50)/(3 * 3) \n \n (50)/(9) \n \n 5 (5)/(9) \n \n Answer: \fbox {5 5/9} \ or \ \fbox {5.5556} \n \n ----------- \n \n (8 + 7a) + 4 \n \n 8 + 7a + 4 \n \n 7a + 12 \n \n Answer: \fbox {12 + 7a}$

(5/3)(10/3)

=(5/3)(10/3)

=(5)(10)
--------
(3)(3)

=50/9 (~5.6)

..........

Let's simplify step-by-step.

(8+7a)+4

Combine Like Terms:

=8+7a+4

=(7a)+(8+4)

=7a+12

Answer:

=7a+12 (d.)

Write 0.39 repeating as a fraction in simplest form.