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Elanso [62]
4 years ago
13

The school cafeteria has 19 round tables and 13 rectangular tables. Each round table has 3 chairs, and each rectangular table ha

s 7 chairs. How many chairs are there in all?
WILLL GIVE BRAINLIST!!!
Mathematics
2 answers:
MariettaO [177]4 years ago
7 0

Answer:

148

Step-by-step explanation:

19 round tables

13 rectangular tables

19 x 3 = 57

13 x 7 = 91

57 + 91 = 148

Marianna [84]4 years ago
5 0

Answer:

148 \:  \: chairs

Step-by-step explanation:

19 \times 3 = \:  \:  \:  \:  \:  \:   57 \\ 13 \times 7 =  + 91 \\   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: = 148

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Read 2 more answers
surveyor stands 100 m from the base of a tower on which an antenna stands. He measures the angles of elevation to the top and bo
balu736 [363]

Answer: 36.3m

Step-by-step explanation:

To solve this, we can draw two triangle rectangles, where the distance between the man and the base of the tower is one of the cathetus, the adjacent one, the height will be the opposite cathetus.

The triangle where the elevation angle is 58° is associated with the height of the tower without the aerial

The other triangle, where the elevation angle is 63° is associated with the height of the tower with the aerial.

Then we can calculate those two heights, then compute the difference, and the difference will be equal to the height of the aerial.

In both cases we want to calculate the opposite cathetus, then we should use the relation:

Tan(θ) = (Op. cath)/(Adj. cath)

The height without the aerial is h1, let's find it:

Tan(58°) = h1/100m

Tan(58°)*100m = h1 = 160m.

The height with the aerial is h2, let's find it:

Tan(63°) = h2/100m

Tan(63°)*100m = h2 = 196.3m

Then the height of the aerial will be:

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6 0
3 years ago
What is the area, in square units, of the polygon shown here?
Molodets [167]

The area of a 2D form is the amount of space within its perimeter. The correct option is D.

<h3>What is an area?</h3>

The area of a 2D form is the amount of space within its perimeter. It is measured in square units such as cm², m², and so on. To find the area of a square formula or another quadrilateral, multiply its length by its width.

The area of the L block will be the sum of the area of A and B. Therefore, the area can be written as,

Area of L block = Area of A + Area of B

                          = (7×2) units² + (1 × 5) units²

                          = 14units² + 5units²

                          = 19units²

Hence, the correct option is D.

Learn more about Area:

brainly.com/question/1631786

#SPJ1

3 0
2 years ago
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