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polet [3.4K]
3 years ago
6

3x + 4y = 7 -3x + 9y = 6 X= Y=

Mathematics
2 answers:
hoa [83]3 years ago
5 0

Answer:

x=4          y=9

Step-by-step explanation:

i said so

Paraphin [41]3 years ago
3 0

Answer:

3x + 4y = 7

-3x + 9y = 6

x=4

y=9

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Hi! can you please help me and show me how you got your answer? thank you!
Kamila [148]

Answer:

Step-by-step explanation:multipy -4x and 4 by 2 were the 8x and the -8x would cancel then add and bring down answer of x=15

5 0
3 years ago
Pre image ABCD was dilated to produce image A’B’C’D why is the scale factor from the pre image? Enter your answer in the box as
shepuryov [24]

The scale factor of the dilation from ABCD to A′B′C′D′ is 3.

Step-by-step explanation:

Step 1:

In the pre-image ABCD, the length of one of the sides is given as 14 units.

For the other shape A′B′C′D′, the same side as the previous shape is given as 8 units.

Step 2:

To determine the scale factor, we divide the measurement after scaling by the same measurement before scaling.

In this case, it is the given length of the sides CD and C′D′.

So the scale factor = \frac{C^{1} D^{1} }{CD} = \frac{8}{14} = \frac{4}{7} .

So the shape ABCD is dilated by a scale factor of \frac{4}{7} to produce the shape A′B′C′D′.

7 0
3 years ago
The slope of line is -1/3. what is an equation of a line that is perpendicular to line of t
GenaCL600 [577]
If you mean -1/3x try using y=3x
8 0
3 years ago
Help BRAINLIEST........
storchak [24]

Answer:

5.52 is the length of wire

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3 years ago
From a pile of 100 pennies(P), 100 nickels(N), and 100 dimes(D), select 21 coins which have a total value of exactly $1.00. In y
Murrr4er [49]
So, you need 10 penny, 4 nickles and 7 dimes
Lets, check it.
According to the question,
total coins = 21
7 + 4 + 10 = 21
21 = 21.........................................true
Now,
their value should equal $1.00 = 100 cents
Penny = 1 cent
nickle = 5 cent
dime = 10 cent,
So,
(10 *1) + (4 * 5) + (7 * 10) = 100
10 + 20 + 70 = 100
100 = 100......................................true

 
So, you need 10 penny, 4 nickle, and 7 dimes
4 0
3 years ago
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