All categories

3 years ago

I don't know how to do this

Mathematics

1 answer:

Gre4nikov [31]3 years ago

5 0

Answer:

x = -11/5 and y = 24/5

Step-by-step explanation:

Use elimination.

First, we need to multiply so that at least one variable can cancel out.

We can multiply the top equation by 2.

So we get

4x + 6y = 20

Then, we can use elimination.

The x's cancel out.

So we get 5y = 24

Or y = 24/5

Then, we can plug in this y value back into the first equation to find x.

2x + 3(24/5) = 10

2x + 72/5 = 50/5

2x = -22/5

x = -11/5

So x = -11/5 and y = 24/5

You might be interested in

The radius of a circular disk is given as 24 cm with a maximum error in measurement of 0.2 cm. (a) Use differentials to estimate

Vitek1552 [10]

Answer:

30.17 cm

Step-by-step explanation:

area of a circular disc=π*r^2

derivative of area=2*π*r

maximum error= derivative * error in radius

i.e . 2*π*r*0.2

6 0

3 years ago

Find the sample standard deviation with the data 0.62, 1.05, 0.58, 1.17, 1.04, 1.37, 1.32, 0.67, 1.25 1.38, 0.86

sukhopar [10]

$standard \: deviation \: = \sqrt{ \frac{12.5485}{11} } - (1.028) {}^{2} \\ = 0.28981$

4 0

3 years ago

Why is

zloy xaker [14]

Answer:

Only natural numbers (i.e., non-negative integers) can be the exponents of variables in a polynomial.

Step-by-step explanation:

The exponent of variables in a polynomial should be natural numbers ( $0$ , $1$ , $2$ , $3$ , $\dots$ .)

$\sqrt{2\, x}$ is equal to $\sqrt{2}\, x^{1/2}$ . In this expression, $x$ is the variable. Its exponent is $1/2$ , which isn't a natural number.

On the other hand, $\sqrt{2}\, x$ is equivalent to $\sqrt{2}\, x^{1}$ . The exponent of variable $x$ is $1$ , which is indeed a natural number.

$\sqrt{2\, x}$ isn't a polynomial because the exponent of variable $x$ isn't a natural number. On the other hand, $\sqrt{2}\, x$ is indeed a polynomial over the set of real numbers.

3 0

3 years ago

Two BLARBs equal one BLABB. Three BLABBs equal ten BLALBs, and one BLALB equals two BABs. How many BABs equal 6 BLARBs?

puteri [66]

6 barbs =22 as your answer

8 0

3 years ago

Please help

klio [65]

Answer:

The probability that a student taking only math will get picked is approximately 29%

Step-by-step explanation: This is because out of the total number of students taking math (95), 52 of such students are also taking science. In order to get the number of students only taking math you have to do 95-52=43 and to put that against the amount of total students the ratio would be 43:147 or 42/147 and if you plug 42/147 into a calculator you will recieve a long decimal that you can then round to 29%.

6 0

2 years ago

I don't know how to do this​

I don't know how to do this