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Diano4ka-milaya [45]
3 years ago
8

Please hurry!!!!!!

Mathematics
2 answers:
frozen [14]3 years ago
5 0

Answer:

Answer is y =400(2x)

Step-by-step explanation:

mihalych1998 [28]3 years ago
5 0

Answer:

y = 400(2ˣ)

Step-by-step explanation:

it is that answer because 800-400=400 so that would rule out every answer but this one.

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What is the value of x in the equation 3x-4y=65 when y =4
Dovator [93]
3x - 4(4) = 65

First, simplify 4 × 4 to get 16. / Your problem should look like: 3x - 16 = 65
Second, add 16 to both sides. / Your problem should look like: 3x = 65 + 16
Third, simplify 65 + 16 to 81. / Your problem should look like: 3x = 81
Fourth, divide both sides by 3. / Your problem should look like: x = \frac{81}{3}
Fifth, simplify \frac{81}{3} to 27. / Your problem should look like: x = 27

Answer: x = 27

5 0
3 years ago
the sum of three numbers is twenty. the second number is four times the first and the sum of the first and third is eight. what
8090 [49]
Let's call the three numbers x, y, and z. 


The numbers are 3, 12, and 5.
x + y + z = 20
y = 4x
x + z = 8
We can rewrite the first equation because y is 4x, so 
x + 4x + z = 20
5x + z = 20
And now we can use simultaneous equation rules to solve

5x + z = 20
x + z = 8

5x + z = 20
5x + 5z = 40
(subtract)
-4z + -20
÷ -4
z = 5

x + z = 8
x + 5 = 8
x = 3

y = 4x
y = 4 × 3
y = 12

I hope this helps!
4 0
3 years ago
Which solutions is the correct one?
Debora [2.8K]

Answer:

Apoint on negative x-axis

5 0
3 years ago
Read 2 more answers
The following two right triangles are similar.If side PQ = 42, side LM = 28, and side QR = 24, what is the length of side MN?
Phantasy [73]

Answer:

a. 16

Step-by-step explanation:

Find the scale:

42 ÷ 28 = 1.5

Use this scale for QR to find MN:

24 ÷ 1.5 = 16

6 0
3 years ago
Solve by factoring<br> please help this is timed :(
sdas [7]
You find values of 28 that add to -11! in this case thats -7 and -4. after that just plug in (x-7)(x-4)=0 so: x=4, x=7
4 0
3 years ago
Read 2 more answers
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