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3 years ago

Help please! 20 points!

Mathematics

1 answer:

UNO [17]3 years ago

7 0

Answer:

58 in^2

Step-by-step explanation:

The area of one face of the 3" cube is (3 in)^2 = 9 in^2. Then the 6 faces of that will have an area of ...

6·9 in^2 = 54 in^2

The area of the top of the paperweight is unaffected by the area of the added cube: the area the smaller cube covers is exactly the same as its exposed top area. So, the net effect of the added 1" cube is to increase the total area by that cube's lateral area: 4 faces at 1 in^2 for each face, a total of 4 in^2.

Then the total surface area of the paperweight is ...

54 in^2 + 4 in^2 = 58 in^2

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Write numbers on the blanks to create a different expression that is equal to (3+4)+5

gizmo_the_mogwai [7]

Answer:

(3+4)+5=12

Step-by-step explanation:

(3 + 4 ) = 7

7 + 5 =

5 0

3 years ago

Please help <br>Find the area of a circle with a diameter of 30 ft

olga nikolaevna [1]

Answer:

$706.85 {cm}^{2}$

Step-by-step explanation:

$area =\pi {r}^{2} \\ = \pi \times 15 \times 15 \\ = 706.85 {cm}^{2}$

7 0

2 years ago

Read 2 more answers

1. All of the variables below are directly proportional, write an equation linking them:

Natasha2012 [34]

Answer:

a. V = 3M

b. T = 5S

c. Y = 17x

d. H = 12M

e. P = 0.5N

Step-by-step explanation:

a. V= 12 when M =4

12/4 = 3, so in this case, V is 3 times M, that is, V = 3M

b. T= 5 when S=1

5/1 = 5, so in this case, T is 5 times S, that is, T = 5S

c. Y= 34 when x=2

34/2 = 17, so in this case, Y is 17 times x, that is, Y = 17x

d. H=48 when M=4

48/4 = 12, so in this case, H is 12 times M, that is, H = 12M

e. P= 5 when N=10

5/10 = 1/2 = 0.5, so in this case, P is half of N, that is, P = 0.5N

7 0

3 years ago

The temperature of dry ice is -109.3. This is 184.9 less than the outside temperature. Write and solve an equation to find the o

Bas_tet [7]

Answer:

75.6 units

Step-by-step explanation:

The dry ice has a temperature of -109.3 units.

The outside temperature is 184.9 units more than the dry ice temperature.

If the outside temperature is C then we can write from the above condition as

C - 184.9 = - 109.3 ...this equation gives the temperature of outside.

Solving it we get C = 184.9 - 109.3 = 75.6.

So the outside temperature is 75.6 units. (Answer)

3 0

3 years ago

ive students came for after-school tutoring. Priya’s teacher assigned each of them the same number of problems to complete. Then

tensa zangetsu [6.8K]

Answer:

The equation for the situation is:

$5y+2=27$

where $y$ represents the number of questions initially assigned to each student by the teacher.

On solving, we find that 5 questions were originally assigned to each student by the teacher.

Step-by-step explanation:

Question:

Five students came for after-school tutoring. Priya’s teacher assigned each of them the same number of problems to complete. Then she assigned 2 more problems to one of the students. 27 problems were assigned in all. Use y as the variable. Write an equation for the situation. Then, find the number of problems originally assigned to each by the teacher.

Given:

Total number of students = 5

Total problems assigned = 27

To find the number of problems originally assigned by the teacher.

Solution:

Let the number of problems originally assigned by the teacher to each student be = $y$

If each student is assigned $y$ questions initially.

Then, 5 students was initially assigned = $5y$ questions