MATHEMATICS HIGH SCHOOL

If 7 + 3x = 22, then 2x =

Answers

Answer 1

Answer: $7+3x=22\ \ \ /-7\n3x=15\ \ \ /:3\nx=5\n\n\n2x=2\cdot5=10$

Answer 2

Answer:

Hey there!

7 + 3x = 22

3x + 7 = 22

SUBTRACT 7 to BOTH SIDES

3x + 7 - 7 = 22 - 7

CANCEL out3 7 - 7 because it give you 0

KEEP: 22 - 7 because it help solve for the x-value

NEW EQUATION: 3x = 22 - 7
SIMPLIFY IT!
3x = 15

DIVIDE 3 to BOTH SIDES

3x/3 = 15/3

CANCEL out3 3/3 because it give you 1

KEEP: 15/3 because it help solve for the x-value

NEW EQUATION: x = 15/3

SIMPLIFY IT!
x = 5

Therefore, the answer: x = 5

Now that we know what your x-value is.. we can substitute it in your next equation

= 2(5)

= 2 + 2 + 2 + 2 + 2

= 4 + 4 + 2

= 8 + 2

= 10

5 = 5

x = 5 ☑️

Therefore, your overall answer is: x = 5

Good luck on your assignment & enjoy your day!

~Amphitrite1040:)

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Hello?

2×2×2+1+4=?

Please!! Please!! :(

Answers

2 times 2 times 2 equals 8.

8 plus 1 equals 9

9 plus 4 equals 13.

The answer is 13.

Simplify and solve this equation for q: 3q + 5 + 2q – 5 = 65. A. q = 23
B. q = 13
C. q = 15
D. q = 11

Answers

3(13) + 5 + 2(13) – 5 = 65Answer is B

3q + 5 + 2q - 5 = 655q + 0 = 655q divided by 65 is 13 .Answer is B .

Marvin walks at a speed of 7 feet per minute. How many miles per hour is this?

Answers

Answer:

$(7)/(88)\ (miles)/(hour)$

$0.08\ (miles)/(hour)$

Step-by-step explanation:

we know that

The speed is equal to divide the distance by the time

Let

s ----> the speed

x ----> the distance

y ----> the time

$s=(x)/(y)$

we have

$x=7\ ft$

$y=1\ min$

Remember that

$1\ mile=5,280\ feet$

$1\ hour=60\ minutes$

$x=7\ ft=(7)/(5,280)\ mi$

$y=1\ min=(1)/(60)\ h$

Find out the speed in miles per hout

$s=((7/5,280))/((1/60))=(420)/(5,280)\ (miles)/(hour)$

Simplify

$(7)/(88)\ (miles)/(hour)$

$0.08\ (miles)/(hour)$

Slope of (9,3) (19,-17) using slope formula

Answers

I got m= -2

If that’s not right I’m sorry. But I’m sure it is :)

Hi I need some help with these questions. Thanks :)1. 3 consecutive odd numbers add to give 405. Find the smallest of the numbers.

2. 5 times a number less 7 is equal to 7 times the number plus 13. Find the number.

3. Chris earns four times Vesna's wage v and Vesna earns $17 more than Dawn. How many dollars does Chris earn if their combined wages are $163?

4. Percy is 8 years older than Ginny. In ten years time he will be three times Ginny's present age. How old is Percy now?

5. The two equal sides of an isosceles triangle are given as ( x + 2 ) cm and the third is ( x + 6 ) cm. I the perimeter of the triangle is 385 cm, find the value of x.

6. A choc frog is 11 cents dearer than a green frog. 3 green frogs and 2 choc frogs cost 57 cents. What is the cost of a choc frog I cents?

Answers

1. 3 consecutive odd numbers are x, x+2, x+4
x+x+2+x+4=405
x+x+x+2+4=405
3x+6=405
3x=399
x=133 (smallest of the numbers)

2. Let the number =x
5x-7=7x+13
-7-13=7x-5x
-20=2x
x=-10

3. Chris earns 4v, Vesna earns v, Dawn earns v-17
4v+v+v-17=163
6v-17=163
6v=180
v=$30
Chris earns 4v=$120

4. Ginny is x years old, Percy is x+8 years old
  In 10 years time, Percy will be x+8+10=3x
  x+18=3x
  18=2x
x=9
  Percy is 9+8 years now=17 years

5. Perimeter of the triangle=sum of its sides
  385=x+2+x+2+x+6
  385=3x+10
  375=3x
  x=125cm

6. A choc frog costs x. A green frog costs x-11
2x+3(x-11)=57
2x+3x-33=57
5x=90
x=18 cents
  A choc frog costs 18 cents

What is 1/2 × 2/3?I really need help and someone please show me in step i dont understand how to do it

Answers

Hi there! All you do is regular multiplication. 1*2=2 and 2*3=6, if you combine 2 and 6 the fraction would be 2/6. We divide 2/6 by 2, 2÷2=1 and 6÷2=3, which is 1/3. Bascially 2/6 simplified is 1/3. Therefore, your answer is 1/3.

Hey, AbbyRoss232!
Hi, I see you need help with multiplying fractions. I will try my best to help you, and hopefully, you will be excellent at it!

1*2=2
2*3=6
2/6 and that can be simplified as 1/3!
I divided the numerator and denominator by 2 and got 1/3.

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