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Phantasy [73]
3 years ago
5

If 3m equals 129, then what is m? 3m=129 m?

Mathematics
1 answer:
Ksivusya [100]3 years ago
7 0
The answer to the question is 43
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Solve the system of equations by using substitution.<br> x+8y=-2<br> x-3y=20
zysi [14]

Answer:

(14, -2)

Step-by-step explanation:

To solve by using substitution, begin by solving for a variable in the first equation. Let's solve for x:

x+8y=-2\\x=-2-8y

Now we know what <em>x</em> equals. Let's substitute this into the second equation:

x-3y=20\\(-2-8y)-3y=20

We can then simplify:

-2-8y-3y=20 Given equation

-2-11y=20 Combine y terms

-11y=22 Add 2

y=-2 Divide by -11

So, we now know the value of y = -2.

To find the value of X, we can substitute the value of Y into one of the equations. Let's use the first one:

x+8y=-2

x+8(-2)=-2 Substitute for y

x-16=-2 Distribute 8

x=14 Add 16

So, we now know the value of x = 14.

Therefore, we know a solution to the system of equations is (14, -2).

4 0
3 years ago
Marco is playing a game with a standard deck of cards. The first person to select a heart from the deck without looking wins. Wh
mestny [16]

Answer:

What is the theoretical probability that Marco will choose a card with a heart on it?  It will be 1/4

What is the theoretical probability that Marco will choose a card without a heart on it?  the answer to this is 3/4

Step-by-step explanation:

7 0
3 years ago
Factonze : x²+2x - 15​
Sholpan [36]
I just got this off photo math they want me to type so I’m just finna say stuff but the answer is right there

4 0
2 years ago
Can you help me with this...thank you​
mr_godi [17]
You solve by with by altitude! Hope it helps
3 0
3 years ago
Read 2 more answers
Idk the answer can u help me
valentinak56 [21]

The answer is C) 67

Angle FGE is a right angle so it is 90 degrees and angle AGF is the same as CGD so it is 23 degrees.

Add angle FGE and angle AGF together (90 + 23 = 113) and subtract that by 180 (180 - 113 = 67)

3 0
3 years ago
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