All categories

3 years ago

Which of these strategies would eliminate a variable in the system of equations?

Mathematics

1 answer:

SVEN [57.7K]3 years ago

4 0

Answer: Multiply the top equation by , multiply 3 the bottom equation by 2, then add the equations.

Step-by-step explanation:

6x - 15y = 39

+ (- 6x + 4y) + (26)

- 11y = 65

You might be interested in

Justin wants to buy a new pair of Jean's. If the jeans were originally $50.00, but are on sale with a 30% discount, how much wil

Paraphin [41]

Answer:oyoyoyohkyhiibjgi

Step-by-step explanation:

ykhitrjhithihtrnht

8 0

3 years ago

A cone has a slant length of 10 and a diameter of 8. Height is unknown.

patriot [66]

Answer: 153.56

Step-by-step explanation:

Hi, to answer this question we have to apply the next formulas:

Volume of a cone: 1/3 π r² h

Where r is the radius and h is the height (unknown)

Diameter = r x 2

8 = 2r

8/2 =r

r = 4

Before calculating the volume we have to apply the Pythagorean Theorem to find h. (where the slant is the hypotenuse and h and r are the sides of the triangle)

10 ² = h² + 4²

Solving for h

100 = h² + 16

100-16 = h²

84= h²

√84 =h

9.16= h

Back on the volume formula:

V= 1/3 π r² h

V =1/3 π 4² (9.16) =153.56

6 0

3 years ago

6% of $33 is $______ someone please answer and thanks :) i'll give brainilist <3

Zanzabum

Answer:

1.98

Step-by-step explanation:

7 0

3 years ago

Question 4 options: Find the mean and standard deviation for a binomial distribution with 680 trials and a probability of succes

lys-0071 [83]

Answer:

Mean for a binomial distribution = 374

Standard deviation for a binomial distribution = 12.97

Step-by-step explanation:

We are given a binomial distribution with 680 trials and a probability of success of 0.55.

The above situation can be represented through Binomial distribution;

$P(X=r) = \binom{n}{r}p^{r} (1-p)^{n-r} ; x = 0,1,2,3,.....$

where, n = number of trials (samples) taken = 680 trials

r = number of success

p = probability of success which in our question is 0.55

So, it means X ~ $Binom(n=680, p=0.55)$

Now, we have to find the mean and standard deviation of the given binomial distribution.

Mean of Binomial Distribution is given by;

E(X) = n $\times$ p

So, E(X) = 680 $\times$ 0.55 = 374

Standard deviation of Binomial Distribution is given by;

S.D.(X) = $\sqrt{n \times p \times (1-p)}$

= $\sqrt{680 \times 0.55 \times (1-0.55)}$

= $\sqrt{680 \times 0.55 \times 0.45}$ = 12.97

Therefore, Mean and standard deviation for binomial distribution is 374 and 12.97 respectively.

3 0

3 years ago

What number is 10times bigger than 30

barxatty [35]

Answer:

300

Step-by-step explanation:

30 * 10 = 300

5 0

3 years ago

Read 2 more answers