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3 years ago

Find the value of the expression dc + 2h for c = 2, d = 3, and h = 3.

Mathematics

2 answers:

iren2701 [21]3 years ago

7 0

Answer:

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Step-by-step explanation:

Step 1: Define

dc + 2h

c = 2

d = 3

h = 3

Step 2: Evaluate

Substitute: 3(2) + 2(3)
Multiply: 6 + 6
Add: 12

raketka [301]3 years ago

4 0

Answer: 12

Step-by-step explanation: replace d and c for their numbers so it would be 3x2 since the numbers are next to each other you multiply. 3x2=6. do the same with the other side: 2x3=6. 6+6=12.

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Answer:

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Step-by-step explanation:

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3 years ago

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vazorg [7]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

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zaharov [31]

Answer:

x = 30° and 330°

Step-by-step explanation:

Assuming the intervals is {0 , 2π} or {0° , 360°}

$tan\ x=\frac{-\sqrt{3} }{3} \\\\x=tan^{-1} (\frac{-\sqrt{3} }{3})\\\\x = -30$

So it means it lies in the 2nd and 4th quadrant because tangent is negative in the 2nd and 4th quadrant

so the two solutions are

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$x=\frac{\pi }{6}\ radians\ \ , \ \ \frac{11\pi }{6}\ radians$

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3 years ago

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Serjik [45]

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3 years ago

What is the radius of a sphere if its surface area is 2,122.64 square inches? (Use 3.14 for π.) 11 in. 13 in. 121 in. 169 in.

crimeas [40]

To solve this, we are going to use the surface are of a sphere formula: $A=4 \pi r^2$
where
$A$ is the surface area of the sphere
$r$ is the radius of the sphere

We know for our problem that $A=2122.64$ and $\pi =3.14$ , so lets replace those vales in our formula:
$A=4 \pi r^2$
$2122.64=4(3.14)r^2$
$2122.64=12.56r^2$
Now, we just need to solve our equation for $r$ :
$\frac{2122.64}{12.56} =r^2$
$r^2=\frac{2122.64}{12.56}$
$r^2=169$
$r=+or- \sqrt{169}$
$r=13$ or $r=13$
Since the radius of a sphere cannot be a negative number, $r=13$ .

We can conclude that the radius of a sphere with surface area 2,122.64 $in^2$ is 13 in.

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3 years ago