All categories

3 years ago

-8x + 7y=-16 4x + y=-28

Mathematics

1 answer:

topjm [15]3 years ago

5 0

Answer:

x=-5

y=-8

Step-by-step explanation:

let first equation be equation 1

let second equation be equation 2

so we gather the like terms

You might be interested in

The numbers 1-10 are written on note cards and placed in a bag. One card will be drawn from the bag at random..

marusya05 [52]

Answer:

Sample space: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10.

Yes, both have 50% probability

No, first event has 30% probability and second one has 20% probability

Step-by-step explanation:

As we have a total of 10 note cards, each if a number from 1 to 10 (each card with a different number) and we want to draw one card at random, the sample space is each of the 10 numbers in the note (sample space with 10 elements):

1, 2, 3, 4, 5, 6, 7, 8, 9, 10.

From this 10 numbers, we have a total of 5 odd numbers and 5 even numbers, so the events of selecting an even number and selecting an odd number are equally likely (the probability of both events are 5/10 = 50%)

The numbers from the sample space divisible by 3 are:

3, 6, 9 (so a total of 3 elements, probability of 3/10 = 30%)

The numbers from the sample space divisible by 5 are:

5, 10 (so a total of 2 elements, probability of 2/10 = 20%)

As the probabilities are different, these events are not equally likely

6 0

3 years ago

Solve −12 − 2x < −3x + 2 < −2(x − 7). 14 over 5 < x < negative 12 over 5 −12 < x < 14 14 < x < −12 12 ov

zepelin [54]

$-12-2x < -3x+2 < -2(x-7)\\\\-12-2x < -3x+2 < -2x+14\ \ \ \ |+2x\\\\-12 < -x+2 < 14\ \ \ \ |-2\\\\-14 < -x < 12\ \ \ \ |\text{change the signs}\\\\14 > x > -12$

3 0

3 years ago

IF A, B, C are three mutually exclusive events with 1/3p(A)=2/3p(B)=1/6P(C).

Bas_tet [7]

A=2(67.76).45 it’s ten divided by 8

7 0

3 years ago

HELP ME PLS ITS BEEN AN HOUR LUV U GUYS <33

Setler [38]

Answer:

19.6 cubic centimeters

Step-by-step explanation:

The ratio of two similar 3D figures' volumes is equivalent to the ratio of their corresponding lengths (whether it's width, height, length, radius, etc) cubed.

Here, we know the cones are similar, and we know the smaller radius is 2 and the larger radius is 3. Then the ratio of the volume of the smaller one to the volume of the larger one is $(2/3)^3=8/27$ .

We also know the actual volume of the larger cone is 66. So, if x is the volume of the smaller cone, we have the proportion:

x / 66 = 8 / 27

Cross-multiply:

27x = 66 * 8 = 528

Divide by 27:

x = 528/27 ≈ 19.6

The answer is thus 19.6 cubic centimeters.

<em>~ an aesthetics lover</em>

3 0

3 years ago

$600 is invested for a year. If the yearly interest rate

Sholpan [36]

505050505 my girlfriend is here in a hurry jon and she

3 0

3 years ago