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BaLLatris [955]
4 years ago
13

Need Help ASAP

Mathematics
1 answer:
rewona [7]4 years ago
3 0

Surface area of the cube = 294 mm²

Solution:

Side of the cube (a) = 7 mm

<u>Formula for the surface area of a cube:</u>

Surface area = 6a^2 sq. units

To find the surface area of the given cube:

Substitute a = 7 mm in the formula.

Surface area = 6\times(7)^2

                     = 6 × 49

                     = 294 mm²

Surface area = 294 mm²

Option C is the correct answer.

Hence the surface area of the cube is 294 mm².

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Which of the following expressions are equivalent to 12x+20? Select all that apply.
GalinKa [24]

Answer:

C

Step-by-step explanation:

4(3x+5) = 12x+20

7 0
3 years ago
Express the negations of each of these statements so that all negation symbols immediately precede predicates. a. ∃z∀y∀xT (x, y,
Bess [88]

Answer:

As shown in the attachment

Step-by-step explanation:

The application of De Morgan's Law was applied as shown in the attachment.

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4 years ago
The side of a square measures (2x − 5) units. Part A: What is the expression that represents the area of the square? Show your w
kolbaska11 [484]

A. The area of a square is given as:

<span>A = s^2 </span>

Where s is a measure of a side of a square. s = (2 x – 5) therefore,

<span>A = (2 x – 5)^2                   </span>

Expanding,

A = 4 x^2 – 20 x + 25

 

<span>B. The degree of a polynomial is the highest exponent of the variable x, in this case 2. Therefore the expression obtained in part A is of 2nd degree.</span>

Furthermore, polynomials are classified according to the number of terms in the expression. There are 3 terms in the expression therefore it is classified as a trinomial.

 

<span>C. The closure property demonstrates that during multiplication or division, the coefficients and power of the variables are affected while during multiplication or division, only the coefficients are affected while the power remain the same.</span>

5 0
3 years ago
PLEASE HELP ME ASAP!!!!!!<br><br><br><br> ty :)
Drupady [299]

Answer:

B should be the answer but it could but C

3 0
2 years ago
A guy wire is attached to the top of a radio antenna and to a point on horizontal ground that 40 m from the base of the antenna.
frutty [35]

Answer:

The length of the wire is 76.19 m.

Step-by-step explanation:

It is given that a guy wire is attached to the top of a radio antenna and to a point on horizontal ground that 40 m from the base of the antenna.

It means base of the right angled triangle is 40 m.

The wire makes an angle of 58deg 20min with the ground.

1 degree = 60 min

Using this conversion convert the given angle in degree.

58^{\circ}20'=58^{\circ}\frac{20}{60}^{\circ}=58\frac{1}{3}^{\circ}=\frac{175}{3}^{\circ}

In a right angled triangle

\cos \theta=\frac{adjacent}{hypotenuse}

\cos (\frac{175}{3}^{\circ})=\frac{40}{hypotenuse}

0.525=\frac{40}{hypotenuse}

hypotenuse=\frac{40}{0.525}

hypotenuse=76.190

Therefore the length of the wire is 76.19 m.

3 0
3 years ago
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