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zhannawk [14.2K]
3 years ago
14

????????????????????????????

Mathematics
1 answer:
UNO [17]3 years ago
3 0

Answer:

A) 5x-7y=42

Step-by-step explanation:

We know that 5 x 7 = 35 then add 7 = 42

We divide 5 and 7 by 5/7

5/  5/7 = 0.1

7/ 5/7 = 0.2

We find 0.1 = 1/10 and we know that 1/10 of 35 is 3.5

We find 0.2 = 2/10 and we know that 2/10 of 35 is 7 so the answer 7 matches.

We then use 7 for y and keep 5 for x.

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Students arrived at the science museum at 1:15 P.M. They stayed at the museum for
Diano4ka-milaya [45]

Answer: A. O 3:06 P.M.

Step-by-step explanation: 1:15+2 hours=3:15       3:15+51 mins=3:06

3 0
3 years ago
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The value of 7y–2 is 10 more than the value of 2y
const2013 [10]

Answer:

y=12/5 (in decimal notation y=2.4)

Step-by-step explanation:

the value of 7y-2 = 10 more than 2y

7y-2 = 10+2y

7y-2y = 10+2

5y = 12

y = 12/5

y = 2.4

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3 years ago
A contractor bought 7.6 ft to the second power of sheet metal. he has used 3.7ft to the scound power so far and has ​$117 worth
bonufazy [111]

Answer:

x= 30

Step-by-step explanation:

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3 years ago
0 = 4x + 4 linear equation
FinnZ [79.3K]

Answer:

x = -1

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Equality Properties

Step-by-step explanation:

<u>Step 1: Define</u>

0 = 4x + 4

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Subtract 4 on both sides:                    -4 = 4x
  2. Divide 4 on both sides:                        -1 = x
  3. Rewrite:                                                 x = -1
7 0
3 years ago
Simplify expression -6x^2+4-x^2+15x
zloy xaker [14]

Combine like terms

-6x² + (-x²) = -6x² - x² = -7x²

-7x² + 15x + 4 is your answer

hope this helps

4 0
3 years ago
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