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Vladimir79 [104]
2 years ago
7

Pleaaaaaasssseeeeee help me with this

Mathematics
2 answers:
Mice21 [21]2 years ago
6 0

Answer:

i think the second one

Step-by-step explanation:

s2008m [1.1K]2 years ago
4 0
Okkk so Surface area is the area of all the surfaces added together, this triangular prism consists of
2 triangles and 3 rectangles

To find the area of a triangle you do base x height divided by 2

To find the area of a rectangle
Length x width

Sooooo

Side 1= triangle
12x16/2: 96

Side 2= triangle
12x16/2: 96

Side 3= rectangle
12x10: 120

Side 4= rectangle
16x10: 160

Side 5= rectangle
10x20: 200

To find the SURFACE AREA
add them all together

96+96+120+160+200= 672 centimeters squared

Or square centimeters

SURFACE AREA UNITS is always squared so like square meters, centimeters, millimeters etc
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Lara employed a residential cleaning service to tidy up her home. They charged her $150 for 3
Natalka [10]

Answer:

Step-by-step explanation:

Find the rate that was charged for Lara's time

       rate = dollars / hour

The use this rate to calculate how many hours it took to clean Roy's house, since the rates are the same.  Solve for hours.....

      rate for Lara = dollars / hour        =  $150 / 3 hour   =     $50 / hour

     rate for Roy = dollars / hour         Solve for hours

                                                            multiply both sides by hours

     (rate for Roy) (hour) = (dollars / hour) (hour)

     (rate for Roy) (hour) = (hour) (dollars / hour)       right side hours cancel

     (rate for Roy) (hour) = (dollars)     divide both sides by (rate for Roy)

     (rate for Roy) (hour) / (rate for Roy) = (dollars) / (rate for Roy)

                       now the rate for Roy on the leftside cancel

     (rate for Roy) (hour) / (rate for Roy) = (dollars) / (rate for Roy)

     (hour) = (dollars) / (rate for Roy)           Plug in $225 charged to Roy

                                                                     and the $50 / hour rate

   

       hour = $225 / ($50/hour)             ( 1 over 1 / hour )  = hour  

                = $(225/50) hour            think about  1 / (1/2)  = 2  the same with units

      hour =  4.5 hours

     

4 0
2 years ago
(b) The perimeter of a rectangular window is 298 cm.
Ronch [10]

Answer:

68

Step-by-step explanation:

81 +81 is 162

298-162=136

136/2=68

3 0
3 years ago
If you toss 9 fair​ coins, in how many ways can you obtain at least one tail​?
maks197457 [2]
9/18 or 50% if you toss the coin because when you toss 1 coin you get a 1/2 chance of getting tails. Do that nine times and you get 9/18
3 0
3 years ago
4. The Television Chocolate Room was painter
VashaNatasha [74]

Answer:

C

Step-by-step explanation:

5 0
3 years ago
Write sin(19°) in terms of cosine.
Leto [7]

Answer:

cos(71)

Step-by-step explanation:

Since 19° is less than 90, we can express this in terms of confunction.

sin(θ) = cos(90-θ)

sin(19) = cos(90-19)

sin(19) = cos(71)

3 0
2 years ago
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