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weeeeeb [17]
2 years ago
8

Is about and DC are parallel, which angles are congruent to D 3?​

Mathematics
1 answer:
joja [24]2 years ago
4 0

Answer:

A

Step-by-step explanation:

Angles 1 and 3 are congruent since they are vertical angles.

Angle 7 is congruent to angle 3 since they are corresponding angles.

Angle 5 is congruent to angle 1 since they are corresponding angles.

Answer: A

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An Elevator descends into a mine shaft at the rate of 5m/min. If the descend starts from 15m above the ground, how long will it
zhenek [66]
First of all, assuming that the "ground level" is 0; 

The lift is not starting from 0, so we also need to account for the extra 15 meters above the ground the lift is. 

The total distance the lift would cover in the downward direction: 15+350=365m

Now, you know that the lift covers 5 m/min

Therefore, 5x=365 (ignoring units because they can complicate things) 

x=365/5 
x=73 minutes 

Therefore, they would take 73 minutes to reach 350 m deep into the ground with a starting position 15 m above the ground. 

Hope I helped :) 
5 0
3 years ago
Which is the best first step and explanation for solving this system of equations? 3x+4y=12 3x=2y-8​
Greeley [361]

Answer:

Since it is a simultaneous equation,

Using elimination method, Multiply equation 1 by the co efficient of x in equation 2 and multiply equation 2 by the co efficient of x in equation 1.

Step-by-step explanation:

For further explanation , Please contact me through the comment section.

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6 0
3 years ago
4 - 2y + 8 = -6 solve for y
cluponka [151]

Answer:

Use the app photomath

Step-by-step explanation:

7 0
3 years ago
Factorize: Challenge problem:<br> x^2+19x+78<br> help :)
Trava [24]

Answer:

(x + 6)(x + 13)

Step-by-step explanation:

Given

x² + 19x + 78

Consider the factors of the constant term (+ 78) whuch sum to give the coefficient of the x- term (+ 19)

The factors are + 6 and + 13 , since

6 ×13 = + 78 and 6 + 13 = + 19 , then

x² + 19x + 78 = (x + 6)(x + 13) ← in factored form

3 0
3 years ago
Read 2 more answers
Is V <br> 5 rational or irrational
madreJ [45]

Answer:

it's a whole number

Step-by-step explanation:

it's a whole number

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