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3 years ago

-2.074 + 1.8 I need help it’s math and it’s multiplying decimals

Mathematics

1 answer:

jok3333 [9.3K]3 years ago

3 0

Answer:

-0.274

Step-by-step explanation:

You could just use the calculator, BUT if you want to use pencil paper you have to align them decimal over decimal:

-2.074

- 1.8

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2 years ago

12.5% of what number 24?

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Answer:

192

Step-by-step explanation:

12.5% is 24.

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Done.

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3 years ago

What’s the answer for this equation?<br><br> 1/2 * (1, 341 + 625)

Marysya12 [62]

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Step-by-step explanation:

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2 years ago

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Fill in the blank with a constant, so that the resulting expression can be factored as the product of two linear expressions: 2a

Vitek1552 [10]

Answer:

$2ab - 6a + 5b - 15$

Step-by-step explanation:

Given

$2ab - 6a + 5b + \_$

Required

Fill in the gap to produce the product of linear expressions

$2ab - 6a + 5b + \_$

Split to 2

$(2ab - 6a) + (5b + \_)$

Factorize the first bracket

$2a(b - 3) + (5b + \_)$

Represent the _ with X

$2a(b - 3) + (5b + X)$

Factorize the second bracket

$2a(b - 3) + 5(b + \frac{X}{5})$

To result in a linear expression, then the following condition must be satisfied;

$b - 3 = b + \frac{X}{5}$

Subtract b from both sides

$b - b- 3 = b - b+ \frac{X}{5}$

$- 3 = \frac{X}{5}$

Multiply both sides by 5

$- 3 * 5 = \frac{X}{5} * 5$

$X = -15$

Substitute -15 for X in $2a(b - 3) + 5(b + \frac{X}{5})$

$2a(b - 3) + 5(b + \frac{-15}{5})$

$2a(b - 3) + 5(b - \frac{15}{5})$

$2a(b - 3) + 5(b - 3)$

$(2a + 5)(b - 3)$

The two linear expressions are $(2a+ 5)$ and $(b - 3)$

Their product will result in $2ab - 6a + 5b - 15$

<em>Hence, the constant is -15</em>

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3 years ago