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3 years ago

Urgent!??!!

Mathematics

1 answer:

larisa [96]3 years ago

7 0

Answer:

Liza rode 0 miles more than Kelly. They both rode 25 miles.

Step-by-step explanation:

If they both rode the same amount, and Liza rode 25 miles in all, then Liza rode no more than Kelly.

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Please help with these? thank you

Burka [1]

The answer is the second one; 15y^2–11y

5 0

3 years ago

On a 50 question test, Erick missed 10 questions. What is the exact grade he got on the test?

Bogdan [553]

Answer

He got an 80

Step-by-step explanation:

50 - 10 = 40

40/50 as a whole number is 80

3 0

3 years ago

suppose that incomes of families in Newport Harbor are normally distributed with a mean of $750,000 and a standard deviation of

denis23 [38]

Answer: 0.345

Step-by-step explanation:

Given : The incomes of families in Newport Harbor are normally distributed with Mean : $\mu=\$ 750,000$ and Standard deviation : $\sigma= $250,000$

Samples size : n=4

Let x be the random variable that represents the incomes of families in Newport Harbor.

The z-statistic :-

$z=\dfrac{x-\mu}{\dfrac{\sigma}{\sqrt{n}}}$

For x= $800,000

$z=\dfrac{800000-750000}{\dfrac{250000}{\sqrt{4}}}=0.4$

By using the standard normal distribution table , we have

The probability that the average income of these 4 families exceeds $800,000 :-

$P(x>80,000)=P(z>0.4)=1-P(z\leq0.4)\\\\=1-0.6554217=0.3445783\approx0.345$

Hence, the probability that the average income of these 4 families exceeds $800,000 =0.345

6 0

4 years ago

Help Please!<br> Find the value of x for which ABCD must be a parallelogram.

Pepsi [2]

Answer:

Step-by-step explanation:

We know that the opposite sides of a parallelogram are equal so:

25x+1=7x+37

18x=36

x=2

4 0

3 years ago

How do I find X for this problem? I’m stuck

Bas_tet [7]

Corresponding sides of the two triangles occur in a ratio with one another. In particular, you have the relationship

$\dfrac6{6+x}=\dfrac{10}{15}=\dfrac y{y+4}$

We only need the first two parts to solve for $x$ :

$\dfrac6{6+x}=\dfrac{10}{15}\implies6\cdot15=10(6+x)\implies90=60+10x\implies30=10x$

$\implies\boxed{x=3}$

8 0

4 years ago