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Degger [83]
3 years ago
10

There are 10 cards placed face down on a table. Four of the cards have stars on them and the other 6 are blank. You

Mathematics
1 answer:
stiv31 [10]3 years ago
4 0

The first one is out, because it isn't fair. We want a 50/50 chance to win. If we add 2 cards with stars, then your chance of winning increases too much(as much as that'd be great). If we take away 2 blank ones, it would be fair, but we want to still have 10 cards. So the only choice left is to add a start to 1 of the blank cards.

---

hope it helps

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Kala, Deandre, and Eric have a total of $119 in their wallets, Kala has $6 more than Deandre. Eric has 3 times what kala has. Ho
Tomtit [17]
Deandre = x
Kala = x + 6
Eric = 3(x+6)
x + x + 6 + 3(x+6) = 119
2x + 6 + 3x + 18 = 119
5x + 24 = 119
5x = 95, x = 19
Deandre has $19
Kala has 19 + 6 = $25
Eric has 3(25) = $75
4 0
3 years ago
The numbers x and y are inversely proportional. When the sum of x and y is 42, x is twice y. What is the value of y when x = -8?
dolphi86 [110]

Answer:

y= -4

Step-by-step explanation:

x+y=42.   We know that x plus y equals 42.

x=2y .   We also know that x equals twice y.

2y+y=42.   Since we know that x=2y, we're going to replace x with 2y from the original equation, simplified would be 3y=42.

y=14.   3y=42 simplified is y=14, this is because we divided both sides by 3 (since 3 and 42 are both divisible by 3) (btw divisible by 3 simply means that it can be divided by 3)

x+14=42.   Now that we know what y equals, let's replace y with 14 from the original equation.

x=28.  Now that we know that x=28 and y=14, we know that y is always x/2.

When x=-8, we divide it by 2 and get, -4.

Not absolutely positive as this was all mental math, but hope this helps! :)

4 0
3 years ago
HELP ASAP PLEASE.
ValentinkaMS [17]

Answer:

pls give brainlist

Step-by-step explanation:

a. \frac{50 blocks (L)}{9 blocks(W)\\}  50 x 9 = 450. A=450

b. I can scale the unit rate of the area given above and largen the area of the map. Ex. \frac{7}{3}=\frac{21}{6} <---(scaled by 2)

Then we can enlarge it however we want so,

\frac{21}{6} = \frac{42}{12}  <--(scaled by 2 once more)

If the statement above is true then we can scale times 4.

\frac{7}{3}= \frac{42}{12}\\ <---(scaled by 4)

A= \frac{42}{12\\}

all i can give u at the moment , if u go on M a t h w a y it can help

5 0
2 years ago
Read 2 more answers
What is a correct congruence statement for the triangles shown?
valkas [14]

Answer:

kuha ka bato pukpok mo sa ulo mo para malaman mo

7 0
2 years ago
What does measuring the spread of a data set tell us, and why is that significant?
Ann [662]

Step-by-step explanation:

Measure of spread is used in describing the variability in a sample.

Examples of measure of spread are: Mean, Median and Mode.

A measure of spread helps in giving an idea of how well the mean, or mode, or median, whichever of the three measure of spreads we use, represents the data under consideration. If the spread of values in the data set is large, that means there a lot of variation between the values of the data set. It is always better to have a small spread.

5 0
3 years ago
Read 2 more answers
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