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3 years ago

Mark is 3 less than 4 times as old as tim. Together their ages total 42. How old is mark

Mathematics

1 answer:

lorasvet [3.4K]3 years ago

7 0

Answer:

Step-by-step explanation:

3*4=12

42-12=30

=30

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Given that q(x) = 6 -5x and q(x) =21 x=

ELEN [110]

Answer:

x = -3

Step-by-step explanation:

6 - 5 ( -3 ) = 21

21 = 21 ✅

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3 years ago

Write a phrase that means the same <br> as x/4

blagie [28]

Answer:

Do you have choices?

Step-by-step explanation:

Im not sure off the top of my head

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3 years ago

James is studying different kinds of weather.

expeople1 [14]

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3 years ago

The average time a subscriber spends reading The Wall Street Journal is 49 minutes (The Wall Street Journal Subscriber Study). A

erica [24]

Answer:

$P(X>60)=P(\frac{X-\mu}{\sigma}>\frac{60-\mu}{\sigma})=P(Z>\frac{60-49}{16})=P(z>0.6875)$

And we can find the probability with the complement rule and the normal standard distirbution and we got:

$P(z>0.6875)=1-P(z$

Step-by-step explanation:

Let X the random variable that represent the time spent reading of a population, and for this case we know the distribution for X is given by:

$X \sim N(49,16)$

Where $\mu=49$ and $\sigma=16$

We are interested on this probability

$P(X>60)$

And we can use the z score formula given by:

$z=\frac{x-\mu}{\sigma}$

Using this formula we got:

$P(X>60)=P(\frac{X-\mu}{\sigma}>\frac{60-\mu}{\sigma})=P(Z>\frac{60-49}{16})=P(z>0.6875)$

And we can find the probability with the complement rule and the normal standard distirbution and we got:

$P(z>0.6875)=1-P(z$

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3 years ago

The solution set for -p2 − 11p = 0 is { }. (Separate the solutions with a comma.)

ikadub [295]

Answer:

0,-11

Step-by-step explanation:

-p^2 − 11p = 0

Factor out -p

-p( p+11) =0

Using the zero product property

-p =0 p+11 =0

p =0 p = -11

3 0

3 years ago