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amm1812
2 years ago
13

3x times (7 times x)

Mathematics
1 answer:
Andru [333]2 years ago
3 0

Answer:

21x raised to the second power

Step-by-step explanation:

3x ( 7 times x)

3x(7x)

21x^2

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Help me with this question please
docker41 [41]

7x/x-4 * x/x+7

mutiply the numerators together

(7x)(x)= 7x^ 2

mutiply the denominators together

(x-4)(x+7)

(x)(x)(7)(x)= x^2+7x

(-4)(x)(-4)(7)= -4x-28

x^2+7x-4x-28

x^2+3x-28

Answer:

7x^2/x^ 2+3x-28

6 0
2 years ago
A mountain is in the shape of a cone whose height is about 3.7 kilometers and whose base radius is about 3 kilometers. Approxima
Lelu [443]

Answer:

34.54 km^{3}

Step-by-step explanation:

According to the scenario, computation of the given data are as follows,

Height (h) = 3.7 km

Base radius (r) = 3 km

We can calculate the volume of mountain by using following formula,

So, volume of cone = (1/3)πr^{2}h

By putting the value in the formula, we get

= (1/3) π × 3^{2} × 3.7

= 11.1π

= 34.54 km^{3}

Hence, the volume of the mountain is  34.54 km^{3}.

7 0
3 years ago
Explain why the expression 7•3x is not equal to the expression 21x
Firdavs [7]
Working out the expression 7(3ˣ) is first to calculate the value of 3ˣ then multiply the answer to 7.

For example, let x = 2
Then 7(3ˣ) = 7(3²) = 7 × 9 = 63

With the same value of x = 2, calculating 21ˣ = 21² = 441, which isn't the same answer with the expression 7(3ˣ)
5 0
3 years ago
What is the area of a flour tortilla that has a 14-centimeter radius?
kykrilka [37]
The formula for the area of a circle is
\pi {r}^{2}
so you simply plug your value for radius into the equation!
\pi {(14)}^{2}
Square 14
196\pi
And Multiply by pi!
615.75 cm^2 approximately!
I hope this helps!
5 0
2 years ago
Which line is perpendicular to a line that has a slope of 1/2?
Virty [35]

Answer:

LINE HJ

Step-by-step explanation:

The slop of the line you are given is 1/2. The perpendicular of that is -2/1. I got that bc it is the negative reciprocal.

6 0
3 years ago
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