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Rus_ich [418]
3 years ago
10

Mr.Clark takes 25 minutes to brush his teeth. Mrs. Clark spends

Mathematics
2 answers:
SVETLANKA909090 [29]3 years ago
8 0

Answer:

30

Step-by-step explanation:

25 times 1.2= 30

Simora [160]3 years ago
4 0

Answer:

30

 Step-by-step explanation:

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A convex polyhedron has (a + 3) faces, (2a) vertices, and (4a – 1) edges. What is the value of a? a =
rusak2 [61]
Number of faces: F=a+3
Number of vertices: V=2a
Number of edges: E=4a-1

V+F-E=2
Replacing V=2a; F=a+3; and E=4a-1 in the formula above:
(2a)+(a+3)-(4a-1)=2
Eliminating parentheses:
2a+a+3-4a+1=2
Adding similar terms:
(2+1-4)a+(3+1)=2
(-1)a+4=2
Solving for a. Subtracting 4 both sides of the equation:
(-1)a+4-4=2-4
(-1)a=-2
Dividing both sides by (-1)
(-1)a/(-1)=-2/(-1)
a=2

Answer: The value of a is: a=2

4 0
3 years ago
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The minute hand on a watch is 14 millimeters. In the course of an hour, how much area does it cover? Leave answers in terms of π
Lesechka [4]
In an hour the minute hand goes all the way around, or a 360 loop. so it's its \pi times the radius squared.
8 0
3 years ago
The graph models the cost of a cheese pizza with extra toppings at two different restaurants. According to the graph, about how
den301095 [7]

We have been given a graph that models the cost of a cheese pizza with extra toppings at two different restaurants. Now using the graph, we have to find about how many pizza toppings must be added to make the cost of the pizzas from both restaurants equal.

To find that we just have to look at the intersection point of both graphs.

If you look carefully then you will find that both graph intersect at the point where x-coordinate is 5.

Hence final answer is 5 toppings.

5 0
4 years ago
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Solve for x. 4(x + 2) = 48 x = 6 1/2 x = 7 1/2 x = 10 x = 14
____ [38]

Answer:

Step-by-step explanation:

4(x + 2) = 48

4x+8=48

4x=40

x=10

7 0
3 years ago
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A rectangle is also a _____. <br> A. kite <br> B. parallelogram <br> C. triangle <br> D. square
Maksim231197 [3]
B a parallelogram is also a rectangle
4 0
4 years ago
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