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kodGreya [7K]
3 years ago
8

2x - 5y – z = 20 -3.x - 3y + 33 = 9 -2x - 2y - 43 = -24

Mathematics
1 answer:
densk [106]3 years ago
4 0

Answer:

6

Step-by-step explanation:

1)I'm sorry

2)I'm desperate okay?

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HELPPP ILL GIVE U POINTS​
GREYUIT [131]
The first one... |-100| > |50|
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3 years ago
The graph plots for equations, a,b,c, and d: which pair of equations have (4,8) as its solution?
nataly862011 [7]

D and B

Explanation:

when you look at that point two lines pass through it and those two lines that pass through it are b and d.

4 0
2 years ago
Clark has a box of nickels and dimes that totals $1.90. there are a total of 27 coins. how many nickels and dimes does he have?
Andrej [43]
$0.05(n) + $0.10(d) = $1.90
n + d = 27
n + d - d =27 - d
n = 27 - d

$0.05(27-d) + $0.10(d) = $1.90
1.35 - 0.05d + 0.10d = $1.90
1.35 +0.05d = $1.90
1.35 - 1.35 +0.05d = $1.90 -1.35
0.05d = 0.55
0.05d/0.05 = 0.55/0.05
d = 11

n = 27 - 11
n = 16

$0.05(16) + $0.10(11) = $1.90
$0.80 + $1.10 = $1.90
$1.90 = $1.90
4 0
3 years ago
Place an operation sign between two of the digits to make the equation true
I am Lyosha [343]

An addition sign between 978 and 842 would make the equation true!

7 0
3 years ago
Is there enough information shown on the triangles to say that the
Harlamova29_29 [7]

Answer: (D) No. The corresponding pairs of sides must also be marked  congruent to determine that the triangles are congruent.

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

Explanation:

The arc markings tell us how the angles pair up, and which pairs are congruent. Eg: The double-arc angles are the same measure.

Despite knowing that all three pairs of angles are congruent, we don't have enough information to conclude the triangles are congruent overall. We can say they are similar triangles (due to the AA similarity theorem), but we can't say they are congruent or not. We would need to know if at least one pair of sides were congruent, so that we could prove the triangles congruent.

The list of congruent theorems is

  • SSS
  • ASA
  • AAS (or SAA)
  • SAS
  • HL
  • LL

Much of these involve an "S", to indicate "side" (more specifically "pair of sides). Both HL and LL involve sides as well. They are special theorems dealing with right triangles only.

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

So in short, we don't have enough info. We would have to know information about the sides. This is why choice D is the answer.

7 0
2 years ago
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