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2 years ago

Which expression is equivalent to 7 (a + 2) when a = 6?

Mathematics

2 answers:

Ket [755]2 years ago

4 0

It is equivalent to 7(6) + 14

Step-by-step explanation:

Step 1: Solve 7(a + 2) when a = 6

⇒ 7 (6 + 2) = 7 × 8 = 56

Step 2: Find its equivalent

7(6) + 14 = 42 + 14 = 56

Mrrafil [7]2 years ago

4 0

The answer is 7(6)+14

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(Picture) MULTIPLYING MONOMIALS AND BINOMIALS

lilavasa [31]

Answer:

Second option: B and C

Step-by-step explanation:

A is the product of 4x and -2x: A=(4x)(-2x)→A=-8x^2 (x^2)

B is the product of 4x and 3: B=(4x)(3)→B=12x (x^1)

C is the product of 1 and -2x: C=(1)(-2x)→C=-2x (x^1)

D is the product of 1 and 3: D=(1)(3)→D=3 (constant)

Then, the like terms are B and C

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3 years ago

Raj is simplifying (5^4)^3 using these steps:

Vika [28.1K]

$(a^{x})^{y}= a^{x*y}
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3 years ago

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What is the value of x in the equation 3x-4y=65, when y=4?

Softa [21]

Answer:

$\boxed{ \bold{ \huge{ \boxed { \sf{x = 27}}}}}$

Step-by-step explanation:

Given, value of y = 4

To find : Value of x

$\sf{3x - 4y = 65}$

plug the value of y

$\dashrightarrow{ \sf{3x - 4 \times 4 = 65}}$

Multiply the numbers : 4 and 4

$\dashrightarrow{ \sf{3x - 16 = 65}}$

Move 16 to right hand side and change it's sign

$\dashrightarrow{ \sf{3x = 65 + 16}}$

Add the numbers : 65 and 16

$\dashrightarrow{ \sf{3x = 81}}$

Divide both sides by 3

$\dashrightarrow{ \sf{ \frac{3x}{3} = \frac{81}{3} }}$

Calculate

$\dashrightarrow{ \sf{ x = 27}}$

Hope I helped!

Best regards! :D

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3 years ago

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Can anyone help me? I've been stuck with this problem for hours

boyakko [2]

Answer:

336.02 square centimeters

Step-by-step explanation:

The surface area is the area of all the surfaces of the prism shown.

The prism has 7 surfaces.

Top and Bottom are pentagons with side lengths of 5.

The other 5 side surfaces are rectangles with length 10 and width 5.

Note the formulas of area of pentagon and area of rectangle below:

Area of Rectangle = Length * Width

Area of Pentagon = $\frac{1}{4}\sqrt{25+10\sqrt{5} }* a^2$ , where a is the side length

Lets find area of each of the surfaces:

Top Surface (Pentagon with side length 5) = $\frac{1}{4}\sqrt{25+10\sqrt{5} }* a^2=\frac{1}{4}\sqrt{25+10\sqrt{5} }* (5)^2=43.01$

Bottom Surface = same as Top Surface = 43.01

Side Surface (rectangle with length 10 and width 5) = 10 * 5 = 50

There are 5 side surfaces that are each 50 sq. cm. so area would be:

Area of 5 Side Surface = 5 * 50 = 250

Total Surface Area = 250 + 43.01 + 43.01 = 336.02 square centimeters

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3 years ago

8th grade math, pls explain if you can.

lianna [129]

Answer:

137.44 units^3

Step-by-step explanation:

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3 years ago