MATHEMATICS MIDDLE SCHOOL

A8 x 3B = 2730What number is A and B?      
You don't have to explain
Please answer soon

Answers

Answer 1
Answer: B＝5  A＝7  ＊If you need me to explain message me.

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10 POINTS SO PLEASE HELP!!!!!!!!!1. Evaluate 6r + 7 for r = 1.2
A. 0.2
B. 7.2
C. 13
D. 14.2

2. Write an algebraic expression for " Julie runs three miles less than twice the number of miles, n, that Hannah runs."
A. 2 n -3
B. 3n -2
C. 2n + 3
D. 3n + 2

3. Solve 5s + 40 = 55 using number sense.
A. 3
B. 15
C. 19
D. 95

4. Translate "the sum of eight and the product of two and y is twenty-four" into an equation.
A. 8y - 2 = 24
B. 8y + 2 = 24
C. 8 + 2y = 24
D. 8 - 2y=24

PLEASE GIVE ME THE CORRECT ANSWERS THANKS!

Answers

1 ) substitute the r in the equation for 1.2.6 (1.2)+7= ?...... multiply then add for. answer. 7.2+7= 14.22) since the miles Hanna runs is unknown it makes it n. Julie runs 3 miles less than twice hunny runs. Therefore it should be 2n-3.3) you would subtract the regular number from both sides first so 55-40= 15.. the equation would then be 5s=15 then you would divide both sides by 5...making s=3.4) you would add the sum of 8 to the product of 2 and y to get 24 so it should be 8+2y=24

Simplify the expression: 5( 2j + 3 + j) using the distributive and commutative properties and combining like terms below: (i need 2 equations)

Answers

Answer:

5( 2j+j+3)

15j + 15

Step-by-step explanation:

5( 2j + 3 + j)

Combine like terms

5( 2j+j+3)

5( 3j + 3 )

Distribute

5*3j + 5* 3

15j + 15

Answer:

15j + 15, or 15(1 + j).

Step-by-step explanation:

We must do the work inside the parentheses first.  We get 5( 2j + j + 3), or

5(3j + 3), and then 15j + 15, or 15(1 + j).

(7x+5)(2x3-4x2+9x-3)

Answers

I believe the answer is 3x(3x + 2)




Step-by-step explanation:

how is the process of rewriting literal equations similar to the process of solving equations in one variable?

Answers

Because in both ways, u are isolating a variable by inverse operations.

The square of the sum of two numbers is 144 and the sum of their square is 180, find the numbers ​

Answers

Answer:

x = 13.35, y = - 1.35

or, x = 1.35, y = - 13.35

or, x = - 13.35, y = 1.35

Step-by-step explanation:

Let us assume that x and y are the two numbers.

So, given that (x + y)² = 144

⇒ x² + 2xy + y² = 144 ........ (1)

⇒ x + y = ± 12 ......... (2)

Again, x² + y² = 180 ........... (3)

Now, from equations (1) and (3) we can write 2xy + 180 = 144

⇒ 2xy = - 36

⇒ xy = - 18 ........ (4)

Now, for x + y = 12

⇒ x - (18)/(x) = 12

⇒ x² - 18 = 12x

⇒ x² - 12x - 18 = 0

Using the quadratic formula

x = \frac{12 \pm \sqrt{(-12)^(2) - 4(1)(-18) } }{2}

⇒ x = (12 \pm 14.7)/(2) = 13.35, 1.35

Now, for x = 13.35, from equation (4) we get, y = - 1.35

And for x = 1.35, from equation (4) we get, y = - 13.35

Now, for x + y = - 12

⇒ x² + 12x - 18 = 0

Using the quadratic formula,

x = \frac{- 12 \pm \sqrt{12^(2) - 4(1)(-18)}}{2}

⇒ x = (- 12 \pm 14.7)/(2) = 1.34, -13.35

Now, for x = - 13.35, from equation (4) we get, y = 1.35

And for x = 1.35, from equation (4) we get, y = - 13.35

Therefore, x = 13.35, y = - 1.35

or, x = 1.35, y = - 13.35

or, x = - 13.35, y = 1.35 (Answer)

A building with a height of 32 m casts a shadow that is 20 m long. A person standing next to the building casts a shadow that is 1.2 m long. How tall is the person?

Answers

Answer:

Building's actual height 32 meters

Building's shadow height 20 meters

Person's shadow height 1.2 meters

Person's actual height = ?

Find the person's actual height:

This is a proportion problem.

Actual height to shadow height

Building = Person

32 : 20 = x : 1.2

32 * 1.2 = 20 * x

38.4 = 20x

38.4/20 = 20x/20

1.92 = x

The person's actual height is 1.92 meters long.

32 : 20 = 1.92 : 1.2

32/20 = 1.60

1.92/1.2 = 1.60

Step-by-step explanation:
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