All categories

3 years ago

Solve the system by substitution 3x+y=-16 and y=-x-4

Mathematics

2 answers:

tekilochka [14]3 years ago

8 0

Answer:

x=-6

y=2

hope that helps

balu736 [363]3 years ago

3 0

Answer:

x = - 6

y = 2

Step-by-step explanation:

Equations

3x+y=-16

y=-x-4

Solution

Put y in the second equation into the first equation

3x - x - 4 = - 16

2x - 4 = - 16

2x = - 16 + 4

2x = -12

2x/2 = -12/2

x = - 6

y = -x - 4

y = - -6 - 4

y = 6 - 4

y = 2

===========================

3x + y = - 16

3x + 2 = - 16

3x = -16 - 2

3x = - 18

3x/3 = -18/3

x = -6

You might be interested in

HELP PLEASE WITH THIS ASAP ASAP

Georgia [21]

Answer:

Step-by-step explanation:

62 - 42 = 20

20 / 2 = 10

42 + 10 = 52

52... i think :\

5 0

2 years ago

The diameter of a circle is 5 ft. Find the circumference to the nearest tenth(urgent)

defon

Answer:

15.71

Step-by-step explanation:

To find the radius, half the diameter because r x 2 = diameter. 5/2 = 2.5

Put in circumference formula C=2πr

c=2 x 3.14 x 2.5

c= 2 x 7.85

c=15.7

Put the value into the circle circumference formula C=2πr

5 0

3 years ago

I need help i will mark you brainliest

Reil [10]

Answer:

Step-by-step explanation:

you need to draw a leaf plot

7 0

3 years ago

Adam wishes to have $20 comma 000 available in 18 years to purchase a new car for his son as a gift for his high school graduat

wel

Adam should invest $15516 after 18 years.

<u>Explanation:</u>

Given:

Amount(18) = $20000

Rate of Interest, r = 1.41%

Time, t = 18 years

n = 365 (compounded daily)

General equation of amount that is compounded daily:

$A(t) = A_0(1 + \frac{r}{n} )^n^t$

Solving for A₀:

$A_0 = \frac{A(t)}{(1+\frac{r}{n} )^n^t}$

Substituting the values:

$A_0 = \frac{20000}{(1 + \frac{0.0141}{365})^3^6^5^X^1^8 } \\\\A_0 = \frac{20000}{1.289}\\ \\A_0 = 15516$

Therefore, Adam should invest $15516 after 18 years.

8 0

3 years ago

Find the Simple Interest: $210 at 8% for 7 years *

kenny6666 [7]

Answer:

Simple Interest=PTR/100

Step-by-step explanation:

Principle(P)=$210

Time(T)=7years

Rate(R)=8%

We have,

SI= (210*7*8)/100

=(11760)/100

=117.7

hope it helps uh

4 0

4 years ago