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svetlana [45]
3 years ago
11

HELPPPPPPPPPPPPPPPPWhich statements are true about the ordered pair(-1, -4) and the system of

Mathematics
1 answer:
Anastasy [175]3 years ago
3 0

Answer:

When (-1,-4) is substituted into the second equation, the equation  is true.

The ordered pair (-1,-4) is a solution to the system of linear  equations.

When (-1,-4) is substituted into the first equation, the equation is  true.

Step-by-step explanation:

Given

x - y = 3

7x - y = -3

Required

What is true about (x,y) = (-1,-4)

To do this, we substitute -1 for x and -4 for y in both equations;

For x - y = 3

-1 - (-4) = 3

-1 + 4 = 3

3 = 3

<em>Hence: </em>(-1,-4)<em> is true for </em>x - y = 3<em></em>

For 7x - y = -3

7(-1) - (-4) = -3

-7 +4 = -3

-3 = -3

<em>Hence: </em>(-1,-4)<em> is true for </em>7x - y = -3

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Korvikt [17]

A) profit is 8$, the price increases 8$ every time or each pie is $4

B)N times 4= P

C) 15 times 4= $60 Profit. Because each pie is 4$

D) if 144$ are made and each pie is $4, you’d divide 144 by 4= 36. 36 Pies were sold.

I hope this is correct and helps :)

6 0
4 years ago
the most abundant element in earth’s continental crust, by weight, is _____. calcium silicon iron oxygen
Lelechka [254]
<span>The most abundant element in earth’s continental crust by weight is Oxygen</span>
7 0
3 years ago
Read 2 more answers
You are making gift baskets. each basket will contain three different types of candles: tapers, pillars ad jar candles. tapers c
nikdorinn [45]
Let
x = the number of tapers (each coss $1)
y = the number of pillars (each costs $4)
z = the number of jars (each costs $6)

There are 8 candles in each basket, therefore
x + y + z = 8                   (1)

The cost per basket is $24, therefore
x + 4y + 6z = 24             (2)

The number of tapers equals the sum of pillars and jars, therefore
x = y + z                          (3)

Substitute (3) into (1) and into (2).
y + z + y + z = 8
2y + 2z = 8
y + z = 4                           (4)

y + z + 4y + 6z = 24
5y + 7z = 24                     (5)
From (4), y = 4 -z. Substitute into (5).
5(4 - z) + 7z = 24
2z + 20 = 24
2z = 4
z = 2
y = 4 - z = 4 - 2 = 2
x = y + z = 2 + 2 = 4

Answer: 4 tapers, 2 pillars, 2 jars.
4 0
3 years ago
Please help me
kifflom [539]

Answer:

Angle BCA is 74 degrees, angle MBC is 21, angle MCB is 37, and BMC is 122

Step-by-step explanation:

First off, MBC was an angle that was bisected by point M, meaning that if you took half of angle ABC, you would get your answer.

(0.5)(42)=21

Since you already have two angle measures, being ABC and BAC, you can find angle BCA by adding the two angle measures up, then subtracting by 180 to get your answer:

180=64+42+BCA, which your answer will be 74 degrees.

Now that you have found angle BCA, you take half of that angle measure to then find angle MCB, because point M bisected angles ABC, BAC, and BCA.

(0.5)(74)=37

Finally, since you have found the angles MBC and MCB, in order to find angle BMC you will have to do the same application for BCA:

180=21+37+BMC, which your answer will be 122 degrees.

Hope this helps!

7 0
3 years ago
Please answer!!!!!!!!!!!!!!!!!! (-:
Ludmilka [50]
A-c=b i think. hope this helped
5 0
3 years ago
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