3 years ago

HELP PLS WILL MARK BRAINLY!!!!

Mathematics

2 answers:

Ber [7]3 years ago

8 0

I’m most sure that the answer is A.

Mademuasel [1]3 years ago

4 0

I’m pretty sure that the answer is D

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How would you show the child’s reasoning using base ten blocks?

Phoenix [80]

Answer:

draw two blocks on top of each other being added together

Step-by-step explanation:

draw two blocks being added together...

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3 years ago

Gffdsfsdsfghjkjhgfdsasdfgbhnj utefjfifkcryekxe

Setler [38]

Answer:

HUh? LOL

Step-by-step explanation:

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3 years ago

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Find the surface area of a regualar pyramid that is a pentagonal pyramid with the area of a base is is 440.4mm and a height of 2

Inessa [10]

Answer:

1240.4 mm²

Step-by-step explanation:

The surface area of a pyramid = Area of the all sides + Area of base

Each side is a triangle.

With a regular pentagonal pyramid, the area of each triangle is

$A = \frac{1}{2}\times\text{base}\times\text{slant height}$

For the 5 triangles,

$A = 5\times\frac{1}{2}\times\text{base}\times\text{slant height} = \frac{1}{2}\times5\times\text{base}\times\text{slant height}$

Substituting given values,

$A = 5\times\frac{1}{2}\times16\ \text{mm}\times20\ \text{mm} = 800 \text{mm}^2$

Area of base = 440.4 mm²

Surface area of a pyramid = 800 + 440.4 mm² = 1240.4 mm²

6 0

3 years ago

Can somebody please answer this. I will give brainliest answer.

kolezko [41]

Answer:

121.21 people per square mile

Step-by-step explanation:

area = 1/2(12 + 21)(14) = 231 mi²

28,000/231 = 121.21 people per square mile

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3 years ago

Determine if true:<br> 10x3-20=20

nexus9112 [7]

Answer:

False

Step-by-step explanation:

10x3=30

30-20=10

10=20

These equations dont match.

Hence, the equation is false

4 0

3 years ago

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