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GuDViN [60]
3 years ago
6

Please help me with the geometry.

Mathematics
1 answer:
Fynjy0 [20]3 years ago
8 0

Step-by-step Answer:

To prove

Triangle ADC is congruent to triangle BDC

AC=BC  (given)

DC=DC  (common)

AD=BD (given CD bisects AB)

Therefore triangle ACD is congruent to BDC  (justification: SSS)

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True or false points are usually name by using a lowercase single letter
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true

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Which of the following number lines represents the compound inequality shown below?
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I'm not really sure what the question might be asking or if I've been given all the information but this is how you would solve it as (-2,4] meaning any real number between these will give you a real x on the domain.

Step-by-step explanation:

-4 < 3x + 2 \leqslant 14 \\  - 6 < 3x \leqslant 12 \\  - 2 < x \leqslant 4

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The margin of error ________ (increases or decreases) with an increased sample size and ________ (increases or decreases) with a
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3 years ago
If I turned 9 on November 9th, 2015, exactly how old am I now? (Oct 16th, 2021)
inysia [295]

The answer to this is quite simple my friend.

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8 0
3 years ago
A metalworker has a metal alloy that is 25% copper and another alloy that is 60% copper.How many kilograms of each alloy should
Neporo4naja [7]

Answer:

20kg of 25% copper alloy

30kg of 60% copper alloy

Step-by-step explanation:

There are 2 kinds of metal, first metal(A) have 25% copper while the second metal(B) has 60% copper. The metalworker want to create 50kg of metal, which means the total weight of both metals is 50kg (A+B = 50). The metalworker also want the metal made of a 46% which is 23kg(0.25A + 0.6B = 0.46*50). From these sentences, we can derive 2 equations. We can solve this with substitution.

A+B = 50

A= 50-B

Let's put the first equation into the second.

0.25A + 0.6B = 0.46 *50

0.25(50-B) + 0.6B =23

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Then we can solve A

A= 50-B

A= 50-30

A=20

8 0
3 years ago
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