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raketka [301]
2 years ago
8

5. If I multiply a number by 3 and then subtract 4, the result is the same as twice the number. Find this number. ​

Mathematics
1 answer:
Lina20 [59]2 years ago
5 0

Answer:

4 is the number.

Step-by-step explanation:

Take the missing number as x,

→ (x × 3) - 4 = (x × 2)

→ 3x - 4 = 2x

→ 3x = 2x + 4

→ 3x - 2x = 4

→ [ x = 4 ]

Hence, the number is 4.

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A fruit stand has to decide what to charge for their produce. They need $10 for 44 apples and 44 oranges. They also need $15 for
Bess [88]

Step-by-step explanation:

Let x be the price of an apple and y be the price of an orange.

We have been given that a fruit stand need $10 for 4 apples and 4 oranges. We can represent this information as:

4x+4y=10...(1)

We are also told that they need $15 for 6 apples and 6 oranges. We can represent this information as:

6x+6y=15...(2)

Therefore, our desired system of equations will be:

4x+4y=10...(1)

6x+6y=15...(2)


4 0
3 years ago
Every piece of chicken costs $1.00.
abruzzese [7]

Answer:

5

Step-by-step explanation:

because if each piece of chicken is 1 dollar she would just have to multiply 1×5

4 0
3 years ago
Use quadratic formula solve .7x^2 - 28x - 7​
beks73 [17]

Answer:

x = 2 + sqrt(5) or x = 2 - sqrt(5)

Step-by-step explanation using the quadratic formula:

Solve for x over the real numbers:

7 (x^2 - 4 x - 1) = 0

Divide both sides by 7:

x^2 - 4 x - 1 = 0

Add 1 to both sides:

x^2 - 4 x = 1

Add 4 to both sides:

x^2 - 4 x + 4 = 5

Write the left hand side as a square:

(x - 2)^2 = 5

Take the square root of both sides:

x - 2 = sqrt(5) or x - 2 = -sqrt(5)

Add 2 to both sides:

x = 2 + sqrt(5) or x - 2 = -sqrt(5)

Add 2 to both sides:

Answer:  x = 2 + sqrt(5) or x = 2 - sqrt(5)

6 0
3 years ago
Libby needs to cut pieces of oak molding that are 3/4 yard long. She has 2 yards of oak molding. How many pieces can she cut? Ho
jek_recluse [69]

Answer: She can make two 3/4 yards long of oak molding. She will have half of the second one left over.

Step-by-step explanation:

3 0
3 years ago
Are these questions biased or not???​
o-na [289]

Answer:

No.

Step-by-step explanation:

Biased means extremely on one side, so no, the questions are not biased.

3 0
3 years ago
Read 2 more answers
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