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Katen [24]
4 years ago
10

What is x in -3x-8y=20, -5x+y=19

Mathematics
1 answer:
Dafna1 [17]4 years ago
3 0

Answer:

x = -4

Step-by-step explanation:

solving simultaneously

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3D shapes that have only rectangles are called...?
IgorLugansk [536]

Answer:

cuboid

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
185g in the ratio 2:3
beks73 [17]

ratio 2:3

2 + 3 = 5

185 / 5 = 37

so

37 x 2 = 74

37 x 3 = 111


Answer

185 g in the ratio 2:3 = 74: 111

8 0
3 years ago
6-1/3 divided by 1/4 equals?
bagirrra123 [75]
The answer will be -8
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6 0
4 years ago
8 times of the eight term of an arithmetic progression is equal to 12 times of the twelfth term. find its first term if the comm
Ilya [14]

Answer:

a₁ = 38

Step-by-step explanation:

Given AP, where:

  • 8a₈ = 12a₁₂
  • d = -2,
  • a₁ = ?

=============

<h3>Solution</h3>

aₙ = a₁ + (n-1)d

  • a₈ = a₁ + 7d = a₁ + 7*(-2) = a₁ - 14
  • a₁₂ = a₁ + 11d = a₁ + 11*(-2) = a₁ - 22

8a₈ = 12a₁₂

  • 8(a₁ - 14) = 12(a₁ - 22)
  • 2(a₁ - 14) = 3(a₁ - 22)
  • 2a₁ - 28 = 3a₁ - 66
  • 3a₁ - 2a₁ = -28 + 66
  • a₁ = 38
6 0
3 years ago
Which theorem would you use to prove ABE ~ DCE?
Pachacha [2.7K]
Answer: Choice C) AA similarity

------------------------------------------------------------------------------
------------------------------------------------------------------------------

We are given that angle ABE = angle ECD since they are both right angles (square marker)

Angle AEB = angle CED as they are vertical angles

we have two pairs of congruent angles, leading us to be able to use the AA (angle angle) similarity theorem
3 0
3 years ago
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