Mathematics College


Solve for the two variables in the following system of equations. 7x-8y=-12
--4x+2y=3

Answers

Answer 1

Answer:

x=0, y=3/2. (0, 3/2).

Step-by-step explanation:

7x-8y=-12

-4x+2y=3

----------------

7x-8y=-12

4(-4x+2y)=4(3)

-----------------------

7x-8y=-12

-16x+8y=12

----------------

-9x=0

x=0/-9

x=0

7(0)-8y=-12

0-8y=-12

8y=0-(-12)

8y=0+12

8y=12

y=12/8

simplify

y=3/2

Related Questions

HELP I WILL GIVE BRAINLEIST OR WHATEVER 50 POINTS​

Answers

answer:

a. scarf costs today = $6

b. scarf costs 3 days from now = $3

step-by-step explanation:

1/2 off means you would multiply the amount by 1/2 then subtract

a. original price of scarf: $12

12 X 1/2 = 6

12 - 6 = 6

— scarf costs today = $6

do the same thing but this time it is a different number

b. 12 X 3/4 = 9

12 - 9 = 3

— scarf costs 3 days from now = $3

45633 seconds en heures minutes et seconds

Answers

Yes. I totally agree with that statement. 10/10

Please show your work​

Answers

Answer:

9(3+c+4)=

27+9c+36=

63+9c=

Step-by-step explanation:

9(3+c+4)=

27+9c+36=

63+9c=

Ali's dog weighs 8 times as much as her cat together the two pets weigh 54 lb how much does Ali's dog weigh ​

Answers

Answer:

48

Step-by-step explanation:

Cat = x

Dog = 8x

x + 8x = 54

9x = 54

x = 6, Dog = 8 * 6 = 48

I need help with this problem asap :(

Answers

Answer:

m<P=130°

m<Q=130°

m<R=50°

Step-by-step explanation:

m<P=130

m<Q=130

m<R=50

Tyler has to savings accounts that his grandparents opened for him . One of the accounts Pay 8% annual interest Where as the other pay 10% annual interest. If you have $700 more invested at 10% then you invested at 8%, how much do you have invested in each account If the total amount of interest You earn in a year is $106?

Tyler invested $___at 8%, and $___at 10%

Answers

Thank you hope this helps see photo

help would be v appreciated thx :)

Answers

Answer:

Step-by-step explanation:

What is the value of x?
Enter your answer in the box.
X =

Answers

Answer:

free

Step-by-step explanation:

Answer:

x = 3

Step-by-step explanation:

ok then, firstly, lets make line CB into y

sin45 / y = sin 90 / 6[tex]\sqrt{2}[/tex]

in other words, as sin 90 = 1

y / sin45 = 6[tex]\sqrt{2}[/tex]

y = sin 45 * 6[tex]\sqrt{2}[/tex] = 6 as sin 45 = root2/2, and root2 * root 2 = 2, so

6*2/2 = 6

we also know BCD is 30*, as angles in a tri add up to 180*

so, x/sin30 = 6/sin90 = 6

x/sin30 = 6

6*sin30 = x

x = 3 as sin 30 = 1/2

Is (4,3) a solution to the following system?
X-y=4
2x+y=5
(1 Point)
Yes
Οr
No
(Worth 10 points)

Answers

Answer:

No, it is not a solution

Step-by-step explanation:

Given

[tex]x - y = 4[/tex]

[tex]2x + y = 5[/tex]

Required

Is (4,3) a solution?

(4,3) implies that: [tex]x = 4\ y =3[/tex]

So:

[tex]x - y = 4[/tex]

[tex]4 - 3 = 4[/tex]

[tex]1 \ne 4[/tex]

Because 1 and 4 are not equal, then (4,3) is not a solution

What is the average (arithmetic mean) of 2, 8, 9, and 9?
a) 5
b) 7
c8
c) 8
d) 9

Answers

Answer:

The answer is 7

Step-by-step explanation:

2+8+9+9÷4=7

3. Classify the triangle with the given side lengths as acute, right, obtuse, 10 points
or not a triangle: 11, 13, 25
Not a triangle
Acute
Right
Obtuse
4. Classify the triangle with the given side lengths as acute, right, obtuse, 10 points
or not a triangle. 21, 28, 35
Not a triangle
Acute
Right
Obtuse

Answers

Answer:

3) Obtuse

4) Right

Step-by-step explanation:

3)

11 + 13 > 25 It is a triangle

11² + 13² = 25²

121 + 169 = 625

290 ≠ 625

Since hypotenuse is larger, the triangle is obtuse

4)

21 + 28 > 35 It is a triangle

21² + 28² = 35²

441 + 784 = 1225

1225 = 1225

Since the hypotenuse is equal to the legs, it's a Right triangle

The second group of 20 squirrels of a different breed is placed on a different ranch. The population of squirrels triples each year. Write an equation to model this new situation.

Answers

Answer:    send group

Step-by-step explanation:

find the area of this polygon - PLZZZZZ HELP I WILL GIVE 30 points T^T

Answers

Answer:

82 m should be correct i hope

Step-by-step explanation:

There are 4 oranges, 7 bananas, and 5 apples in a fruit basket.
Ignacio selects a piece of fruit at random and then Terrance
selects a piece of fruit at random.

probability of two bananas
p( two bananas )​

Answers

Pretty low, it’s exactly 0.175

Helppp please I'm stuck ​

Answers

Use pi in the equation to get the answer and for the work but dividends on the sheet

an ice cream company made 38 batches of ice cream in 7.6 hours. assuming A CONSTANT RATE OF PRODUCTION, AT WHAT RATE IN HOURS PER BATCHWAS THE ICE CREAM MADE. (hours per batch)

Answers

Answer:

5 batches per hour

Step-by-step explanation:

Please answer now! Please!
Is this proportional? What is the COP? What is the equation?

Answers

Answer:

Step-by-step explanation:

The constant of proportionality is y/x=k. In this case it is 30/5=48/8...6 k=6

The equation is

y=6x where y=number of wheels and x=number of buses

help me FAST :> math problem 15 points come on please

Answers

Answer:

D

Step-by-step explanation:

z+nm is equiveland to mn+z since its the same equation but wrote in different positions.

Answer: the answer is D

Z + nm

Use the Distributive Property to write an expression that is equivalent to 2(3v + 6)

Answers

Answer:

6v + 12

Step-by-step explanation:

2(3v+6) = 2 * 3v + 2 * 6 = 6v + 12

Hope this helps =]

I need help please.

Answers

Answer:

Answer is C hope this helps

Step-by-step explanation:

I will mark you brainalist

Answers

Answer:

4.6

Step-by-step explanation:

the first equation will be y=1.2x+4.6

the second will be y=0.8x+54.6

then i plugged the system of equations and that was where they met at :)

Answer:

for sure B

Step-by-step explanation:

1. What is the purpose of using a control group and an experimental group in a research study? Give an
example of a situation where they would be used.

Answers

Answer:

A control group is used in an experiment as a point of comparison.

Step-by-step explanation:

By having a group that does not receive any sort of treatment, researchers are better able to isolate whether the experimental treatment did or did not affect the subjects who received it.

(1 point)
Only answer if you know!!! Meg was deep-sea diving at 15 feet below sea level. She dove another 7 feet below sea level. How far
below sea level was Meg?
O 8 ft below sea level
O 12 ft below sea level
O 22 ft below sea level

Answers

22 ft below sea level

Answer:

22 feet below sea level

Step-by-step explanation:

she kept going down, basically in a negative way. adding to the already below sea level

Derek and his friend share two small pizzas Derek ate 7/6 of the pizzas which mixed number shows how much pizza Derek ate

Answers

1 1/6 that would be the mixed number of how much he ate....

I need help please.

Answers

Answer:

may it help you..MARK ME AS BRAINLISTS PLS

select the three expressions that are equivalent to 3/5a + 10
A. 1/5a + 10 + 2/5a
B. a(3/5 + 10)
C. 14 + 3/5a - 4
D. 1/5 (3a + 50)
E. 10 + 2/5a - a + 1/5a

Answers

Answer:

A, C and D

Step-by-step explanation:

Given

[tex]\frac{3}{5}a + 10[/tex]

Required

Select 3 equivalent expressions

[tex]\frac{3}{5}a + 10[/tex]

Express 3 as 2 + 1

[tex]\frac{2 + 1}{5}a + 10[/tex]

Rewrite as:

[tex]\frac{2a + a}{5} + 10[/tex]

Split

[tex]\frac{2a}{5} + \frac{a}{5} + 10[/tex] ----- Option (A)

[tex]\frac{3}{5}a + 10[/tex]

Express 10 as 14 - 4

[tex]\frac{3}{5}a + 14 - 4[/tex]

Rewrite as:

[tex]14+\frac{3}{5}a - 4[/tex] --- Option (C)

[tex]\frac{3}{5}a + 10[/tex]

Factor out 1/5

[tex]\frac{1}{5}(3a + 50)[/tex] --- Option D

Answer:

Option D

Step-by-step explanation:

You can give the guy/girl above Brainliest ^^

They rlly went out of their way to answer that question for you.

They deserve it!

what is 1/2 + 1/3 i know it’s so simple i’m just so bad at maths

Answers

The answer is 5/6......
The Answer Is : 5/6

What is the mean of these numbers?4,5,5,2,3,3,2,8

Answers

Answer:

4

Step-by-step explanation:

Mean is the average of the set of the data in which two or more numbers are present. The mean is used to summarized the data set as the calculation of the mean includes all the values given in the data set. The mean value of the given data set is 4.

Given information

The given numbers of the data set are,

4,5,5,2,3,3,2,8

Total numbers are 8.

Mean

Mean is the average of the set of the data in which two or more numbers are present. The mean is used to summarized the data set as the calculation of the mean includes all the values given in the data set.

Mean is the ratio of the sum of all the terms of the set to the the number of terms in the set.

The mean can be calculated with the following formula,

[tex]\overline x=\dfrac{\sum x}{N} [/tex]

Here N is the total number of the values in the set.

Put the values in the above formula,

[tex]\overline x=\dfrac{4+5+5+2+3+3+2+8}{8} \\ \overline x=\dfrac{32}{8}\\ \overline x=4[/tex]

Hence the mean value of the given data set is 4.

Learn more about the mean here;

https://brainly.com/question/12513463

Determine whether the
following are define function
y=4x+1
[(-1,2), (0, 3) (1,4),(2,6)]
​

Answers

Answer:

sorry but i need the points

Step-by-step explanation:

what 2-1+46-2x0

I tried O but it didn't work

Answers

Answer:

answer is 47

Step-by-step explanation:

use the rule, 2x0 = 0 then (2- 1) that's 1 and then (46-0) that's 46 so 1 + 46 is 47

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