Don't worry, I had a bunch of trouble with this, too.
<span>y = x + 4
y = −2x − 2
Basically, you substitute y for x+4.
Real quick, you know how if you have a problem like, [ y = 3x + 5 ], you're told that x = 2, then solve for y? Substatute basically means replace. So when you're replacing x with 2, your substituting x for 2. The problem you've shown is just a little more complicated.
So you start with this problem:
</span>y = x + 4
y = −2x − 2
Then you replace one y with what the other one is equaled to.
So you end up with something like this:
x + 4 = −2x − 2
Then just solve :)
3x = -6
x = -2
I hope this helps! :D Feel free to ask any questions.
And please, only if you think I deserve it, it would help a bunch if you marked this answer as branliest!
Therefore gelatin would be a homogeneous
Answer:
2.275%
Step-by-step explanation:
We solve this question using z score formula
z = (x-μ)/σ,
where
x is the raw score = 70 mph
μ is the population mean = 100 mph
σ is the population standard deviation = 15 mph
z score = 70 - 100/15
z score = -30/15
z score = - 2
Determining the Probability value from Z-Table:
P(x ≤ 70) = P(x < 70)
= P(z = -2)
= 0.02275
Hence the probability of the player's serve that are less than 70 mph is 0.02275
Converting it to percentage
= 0.02275 × 100
= 2.275%
Therefore, the percentage of the player's serve speeds that are less than 70 mph is = 2.275%
Answer:
10
Step-by-step explanation:
Because is if u count nicely u will see that
