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VladimirAG [237]
3 years ago
14

Mary has four daughters, and each of her daughters has a brother. How many children does Mary have?

Mathematics
1 answer:
Jet001 [13]3 years ago
5 0

Answer:

um 8??

Step-by-step explanation:

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Which number has a 2 with a value ten times greater than the 2 in 5,621?
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215.

The 2 in 5,621 is equal to 20 while 2 in 215 is equal to 200, which is ten times the prior one.
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Find the equation of the line that passes through the points ​(1​,12​) and ​(3​,
Anna35 [415]

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y=-2x+14

Step-by-step explanation:

hope this can help

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A group of hikers walked 2 1/4 km in 3/4 hour.The distance here varies directly with time. What is the constant of variation?
telo118 [61]

The distance depends on the time.

So now we need to find the constant of variation or the constant of proportionality.

To do so we must find y(the dependent variable) and x(the independent variable).

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Since y/x=k

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3 0
3 years ago
Read 2 more answers
(2x + 7y = -24<br>18x+y=12 solve by substitution​
const2013 [10]

Answer:

x = .87, or when approximated to a fraction, 27/31

y = -3.67, or when approximated to a fraction, -1287/350

Step-by-step explanation:

Lets start by rewriting out our equations

2x + 7y = -24

18x + y = 12

Lets solve for a y value; the second equation is easiest, as the y value has no coefficient (the number that is multiplied times a variable). To do this, lets move the 18x to the other side. Now our two equations look like:

2x + 7y = -24

y = -18x + 12

Next, lets plus the second equation into the first equation in regards to y.

2x + 7(-18x + 12) = -24

Now, lets solve!

2x -126x + 84 = -24

Then, combine your terms!

-124x = -108

Divide by (-124)!

x = -108/-124

x = 27/31

Now that we know x, lets plug this back in to the first equation to find y!

2(27/31) + 7y = -24

1.74 + 7y = -24

7y = -25.74

y = -3.67, or when approximated to a fraction, -1287/350

4 0
3 years ago
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