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charle [14.2K]
4 years ago
7

Help!!! Please help me I need help on my homework!​

Mathematics
1 answer:
andriy [413]4 years ago
8 0

Answer:

A and C

Step-by-step explanation:

Hopefully this helps

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A triangular pyramid has a base with an area of 21.8 square meters, and lateral faces with bases of 7.1 meters and heights of 9
Ymorist [56]

Answer:

Step-by-step explanation:

A triangular pyramid has a base with an area of 21.8 square meters, and lateral faces with bases of 7.1 meters and heights of 9 meters. Enter an expression that can be used to find the surface area of the triangular pyramid.

The expression is written as:

Surface Area = Area of the base + 1/2( Perimeter × Slant height)

8 0
3 years ago
K/5.2+81.9=47.2<br> please show work tysm
grin007 [14]

Answer:

/5.2 + 81.9 = 47.2

Step-by-step explanation:

Subtract 81.9  from both sides of the equation

Simplify

Subtract the numbers

Multiply all terms by the same value to eliminate denominators

Cancel multiplied terms that are in the denominator

Multiply the numbers

Solution: k = -180.44

3 0
3 years ago
Select the two figures that are similar to the 5 by 5 figure that is shown.
weeeeeb [17]
Answer: the blue and the pink
4 0
3 years ago
What does the expression look like when we substitute the given values for x, y, and z into the expression?
Greeley [361]

The expression will look like 9-(3+2) and will evaluate to 4

Step-by-step explanation:

We have to put the values of x, y and z in the given expression to find the result.

Given:

x-(y+z)

And

x=9\\y=3\\z=2

Putting the values

9-(3+2)\\=9-5\\=4

The expression will look like 9-(3+2) and will evaluate to 4

Keywords: Expressions, Evaluation

Learn more about evaluation at:

  • brainly.com/question/10364988
  • brainly.com/question/10435816

#learnwithBrainly

5 0
4 years ago
Given: Triangle ABC : triangle ADB. AB =24, AD =16 <br> Find: AC
RoseWind [281]

Answer:

<h2>AC = 36.01</h2>

Step-by-step explanation:

Given ΔABC and ΔADB, since both triangles are right angled triangles then the following are true.

From ΔADB, AB² = AD²+BD²

Given AB = 24 and AD = 16

BD² = AB² - AD²

BD² = 24²-16²

BD² = 576-256

BD² = 320

BD = \sqrt{320}

BD = 17.9

from ΔABC, AC² = AB²+BC²

SInce AC = AD+DC and BC² = BD² + DC² (from ΔBDC )we will have;

(AD+DC)² = AB²+ (BD² + DC²)

Given AD = 16, AB = 24 and BD = 17.9, on substituting

(16+DC)² = 24²+17.9²+ DC²

256+32DC+DC² =  24²+17.9²+ DC²

256+32DC = 24²+17.9²

32DC = 24²+17.9² - 256

32DC = 640.41

DC = \frac{640.41}{32}

DC = 20.01

Remember that AC = AD+DC

AC = 16+20.01

AC = 36.01

6 0
3 years ago
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