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riadik2000 [5.3K]
3 years ago
8

Help me pls i need this

Mathematics
1 answer:
arlik [135]3 years ago
3 0

Answer:

96 cm²

Step-by-step explanation:

The lateral surface area (A) is the sum of the areas of the 4 slant faces.

The faces are triangular with area \frac{1}{2} bh , thus

A = 4 × \frac{1}{2} × 8 × 6 = 2 × 48 = 96 cm²

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Using elimination method, what will be the value of y after solving -x - y = 5 and -x + 4y = 15?
natka813 [3]

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Answer:

  y = 2

Step-by-step explanation:

The variable x can be eliminated by subtracting the first equation from the second.

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  5y = 10 . . . . . . . simplify

  y = 2 . . . . . . . . . divide by 5

4 0
3 years ago
Solve 19.9=9y-8. Plz help me to answer this tysm❤
Ilia_Sergeevich [38]

Answer:

3.1

Step-by-step explanation:

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7 0
3 years ago
Find the perimeter of this figure. Please show work. ​
Elena-2011 [213]

Answer:

  40.56 ft

Step-by-step explanation:

The perimeter is the sum of the lengths of the "sides" of this figure. Starting from the left side and working clockwise, the sum is ...

  P = left side (8 ft) + top side (10 ft) + semicircle (1/2×8 ft×π) + bottom side (10 ft)

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7 0
3 years ago
128 is 74% of what number
GarryVolchara [31]
Percent means parts out of 100
74%=74/100=0.74


'of' means multiply


so
128 is 74% of what means
128=0.74 times what
divide both sides by 0.74
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5 0
3 years ago
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