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CaHeK987 [17]
3 years ago
8

A triangular pyramid has these dimensions.

Mathematics
1 answer:
marishachu [46]3 years ago
7 0

Answer: 42 cm3

Step-by-step explanation:

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2 years ago
The length of a rectangle is twice its breadth. If its length is decreased half of the 10 cm and the breadth is increased by hal
Leto [7]

Since the length of this rectangle is twice its breadth, the length is equal to 40 cm.

<h3>How to calculate the area of a rectangle?</h3>

Mathematically, the area of a rectangle can be calculated by using this formula:

Area = Length × Width

Based on the information provided, we have:

  • Its length is decreased half of the 10 cm ⇒ (length - 5)
  • Its breadth is increased by half of the 10 cm ⇒ (breadth + 5)
  • Its area is increased by 75 cm ⇒ (area + 5)

Substituting the parameters into the formula, we have:

LB + 75 = (L - 5)(B + 5)

2B² + 75 = (2B - 5)(2B + 5)

2B² + 75 = 2B(B + 5) - 5(B + 5)

2B² + 75 = 2B² + 10B - 5B - 25

5B = 75 + 25

5B = 100

B = 100/20

B = 20 cm.

For the length, we have:

L = 2B

L = 2 × 20

L = 40 cm.

Read more on rectangle here: brainly.com/question/25292087

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6 0
1 year ago
3.1 - 3.9n - 2n + 6 =<br> I know it's a simple question I just keep forgetting how to do things.
Sliva [168]

Answer:

-5.9n+9.1

Step-by-step explanation:

3.1 - 3.9n - 2n + 6=

Combind like terms

Step 1: -3.9 - 2n=-5.9n

Step 2: 6 + 3.1=9.1

Combine:

-5.9n+9.1

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2 years ago
Read 2 more answers
Help me please ASAP thank youuuuuu
STALIN [3.7K]

Answer: 2 54

Step-by-step explanation:

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Use technology to approximate the solution(s) to the system of equations to the nearest tenth of a unit.
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The technology I used in helping me solve the problem is using Microsoft Excel. I made one column for the x values which were gathered from the choices, one column for f(x) whose equation is 8^(x-9), and another column for g(x) whose equation is log(3x) + 2. 

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