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Anettt [7]
2 years ago
14

Solve for x: 5x + 15 = 28 A: 43/5 B: 13/5 C: 13 D: 43

Mathematics
2 answers:
Ainat [17]2 years ago
8 0

\mathfrak{5x + 15 = 28}

\mathfrak{5x = 28-15}

\mathfrak{5x = 13}

\boxed{\mathfrak{x = \dfrac{13}{5}}} → option B.

\mathbb{MIREU}

lana66690 [7]2 years ago
3 0

Answer:

B

Step-by-step explanation:

The first thing you need to do is,

28 - 15

which is 13.

Now look at the answer choices and multiply them by 5.

It cannot be C or D because it would not fit the equation.

If anyone of them equal 13 then it is the answer.

Now lets try it.

43/5 = 8.6

13/5 = 2.6

8.6 times 5 is way to big so A is not it.

2.6 times 5 is 13.

So it is B.

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3 years ago
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A publisher needs to send many books to a local book retailer and will send the books in a combination of small and large boxes.
Paladinen [302]

Answer:

Answer:

\{ {{20x+30y=280} \atop {y=4x}} .{

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Step-by-step explanation:

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Since each small box can hold 20 books (20x20x ), each large box can hold 30 books (30y30y )and altogether can hold a total of 280 books, we can write the following equation to represent this:

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y=4xy=4x

Therefore, the system of equation that be used to determine the number of small boxes sent and the number of large boxes sent, is:

\{ {{20x+30y=280} \atop {y=4x}} .{

y=4x

20x+30y=280

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3 years ago
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Answer:

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Step-by-step explanation:

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