Answer:
a). 
grains
b). 
c). 
years
Step-by-step explanation:
a). Given Sahara desert has an area of approximately = 9400000 km²
= 9400000×(10000000000) cm²
= 
cm²
Depth of the desert = 150 m
= 15000 cm
Volume of desert = Area × Depth
= 
= 
cm³
Since 1 cm³ holds sand grains = 8000
Therefore, Grains in Sahara Desert = 
=
b). Since 1 cm³ = 8000 grains
1 grain = cm³
c). A truck can carry sand = 20.5 m³ Or 
= 
cm³
Now time taken to recreate Sahara Desert = 
seconds
= 
= 
seconds
= 
years
= years
Simplifying
p + -4 = (-9) + p
Reorder the terms:
-4 + p = (-9) + p
-4 + p = -9 + p
Add '-1p' to each side of the equation.
-4 + p + -1p = -9 + p + -1p
Combine like terms: p + -1p = 0
-4 + 0 = -9 + p + -1p
-4 = -9 + p + -1p
Combine like terms: p + -1p = 0
-4 = -9 + 0
-4 = -9
Solving
-4 = -9
Answers and Step-by-step explanations:
9-18.
a) All the angles of a triangle add up to 180, by definition. So, we can write the expression: 30 + 115 + x = 180.
Then, we can just solve for x by subtracting 30 and 115 from both sides:
x = 180 - 115 - 30 = 35 degrees
b) Again all three angles should add up to 180, so:
x + x + x = 180 ⇒ 3x = 180 ⇒ x = 180/3 = 60 degrees
9-19.
a) These angles add up to 180:
2x + x + 30 = 180 ⇒ 3x + 30 = 180 ⇒ 3x = 150 ⇒ x = 50
2x = 50 * 2 = 100
The missing angles are 100 degrees and 50 degrees.
b) Again, these add up to 180:
x + 10 + x + 90 = 180 ⇒ 2x + 100 = 180 ⇒ 2x = 80 ⇒ x = 40
x + 10 = 40 + 10 = 50
The missing angles are 50 degrees and 40 degrees.
Hope this helps!
Answer:
Hi, please provide a photo or options to pick from. I will answer then.
Step-by-step explanation:
