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frez [133]
3 years ago
9

Could anyone help me out, it’s would mean a lot.

Mathematics
1 answer:
SIZIF [17.4K]3 years ago
6 0

Answer:

x = 19

Step-by-step explanation:

If two lines are perpendicular, they create 4 90° angles. Meaning, in this case, that m<DBC = 90 and m<DBA = 90.

We're given that m<DBE = 2x - 1 and that m<CBE = 5x - 42.

The sum of angles DBE and CBE = m<DBC = 90°

We can add the two angles and set it equal to 90 to find x

2x - 1 + 5x - 42 = 90\\7x - 43 = 90\\7x = 133\\x = \frac{133}{7} =19

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Step-by-step explanation:

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2 years ago
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ipn [44]
Elimination: 

3x - 9y = 3
6x - 3y = -24

3x - 9y = 3
18x - 9y = -72
(subtract)
-15x = 75
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x = -5

(3 × -5) - 9y = 3
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+ 15
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÷ -9
y = -2

Substitution:

6x - 3y = -24
+ 3y
6x = -24 + 3y

÷ 6
x = 4 + 0.5y

3(4 + 0.5y) - 9y = 3
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12 - 7.5y = 3
- 12
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÷ -7.5
y = 1.2

x = 4 + (0.5 × 1.2)
x = 4 + 0.6
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So this one didn't fail as much, but I got different numbers. If you have to give in values, I'd give in the values from the elimination because I don't trust myself when it comes to the substitution
4 0
3 years ago
I need help on it pls
Jobisdone [24]

Answer:

300 necklaces

Step-by-step explanation:

8,400 divided by 28 equals 300

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3 years ago
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