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2 years ago

-1-2•[(-1)+5)} I am so lost on these math problems

Mathematics

2 answers:

nikitadnepr [17]2 years ago

5 0

Answer:

-9

Step-by-step explanation:

Use the order of operations. Do these operations in this order:

Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Note: when either multiplication and division, or addition and subtraction are there, go left to right.

Equation: -1 - 2 · {(-1) + 5}

Solve:

-1 - 2 · {(-1) + 5}
-1 - 2 · {4}
-1 - 8
-9

*Challenge*

Using the same method, see if you can solve this equation:

6 ÷ 2(1+2)

-Chetan K

Pepsi [2]2 years ago

3 0

The answer is -9 because me said so

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The equation tan(55) = 15/b can be used to find the length of line AC.what is the length of line AC round to the nearest 10th 3.

Nadusha1986 [10]

Answer:

10.5 in

Step-by-step explanation:

Given

$tan(55) = \frac{15}{b}$

Required

Find length AC

The question is not detailed enough; so, I'll assume that b represents line AC.

Having said that;

We start by multiplying both sides by b

$tan(55) = \frac{15}{b}$

$b * tan(55) = \frac{15}{b} * b$

$b * tan(55) =15$

Divide both sides by tan(55)

$\frac{b * tan(55)}{tan(55)} = \frac{15}{tan(55)}$

$b = \frac{15}{tan(55)}$

Find tan(55)

$b = \frac{15}{1.42814800674}$

$b = 10.5031130731$

$b = 10.5$ (Approximated)

Length AC is 10.5

7 0

4 years ago

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Help with math please

MA_775_DIABLO [31]

Answer:

Step-by-step explanation:

its kinda obvious

5 0

3 years ago

Which sets of numbers are closed under subtraction?

stealth61 [152]

Integers are closed under subtraction.

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3 years ago

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If 6x+4y=2 and 2x-7y=20 what is 8x-3y ???? ???

Marizza181 [45]

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4 0

4 years ago

Someone help please

MArishka [77]

Answer:

The slope of the line segment CD = 9

Hence, option 'D' is true.

Step-by-step explanation:

Given that the slope of line segment = 9

We know that two triangles would be similar if their corresponding angles are congruent and the corresponding sides are in proportion.

Given that the line segments AB and CD are both parts of the same non-vertical line. It means their slopes must be the same.

Thus, the slope of the line segment CD = 9

Hence, option 'D' is true.

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3 years ago