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3 years ago

Find the value of x in x+y=8 and x-y=6

Mathematics

1 answer:

Diano4ka-milaya [45]3 years ago

7 0

Answer: x=-y+8 and x=y+6

Step-by-step explanation:

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Evaluate 3x² - 1 when x = 2. A. 11 B. 35 C. 3 D. 5

Alexus [3.1K]

Answer:

Step-by-step explanation:

All you need to do is substitute!

(3x2)^2-1

6^2-1

36-1

= 35

Hope this helps!!

4 0

2 years ago

the ratio of the temperature of room S to the temperature of room T is 2:3 and the ratio of the temperature of room T to the tem

zalisa [80]

Step-by-step explanation:

s:t=2:3

t:u=2:3

s:u=?

s/u=2/3

5 0

2 years ago

Allam just finished a great meal at a restaurant in Wisconsin. The sales tax in Wisconsin is 5 percent, and it is customary to l

xeze [42]

So we are given that he ordered a $15 meal
now we need to find how much will he have to pay with tax and tip

so first we find the sales tax of the meal
5% * 15 = 3/4 or 0.75
and the tip
15% * 15 = 9/4 or 2.25

we will add that to the meal price to find the total
15 + 2.25 + 0.75
total is 18
So If Allam ordered a $15 meal, we will have to pay $18 with tax and tip

Hope this helps :)

3 0

2 years ago

Read 2 more answers

2) The number of streetlights in a town is growing linearly. Four months ago (n = 0) there were 130 lights. Now (n = 4) there ar

IRINA_888 [86]

Answer:

Step-by-step explanation:

Since the number of streetlights in a town is growing linearly, the street lights are increasing in arithmetic progression.

The formula for determining the nth term of an arithmetic sequence is expressed as

Tn = a + (n - 1)d

Where

a represents the first term of the sequence.

d represents the common difference.

n represents the number of terms in the sequence.

For n = 0, T0 = 130, therefore,

130 = a + (0 - 1)d

130 = a - d - - - - - - - - - -1

For n = 4, T4 = 154, therefore,

154 = a + (4 - 1)

154 = a + 3d - - - - - - - - - -2

Subtracting equation 2 from equation 1, it becomes

- 24 = - 4d

d = - 24/- 4 = 6

Substituting d = 6 into equation 1, it becomes

130 = a - 6

a = 130 + 6 = 136

a) The explicit formula for the number of lights in n months is

Tn = 136 + 6(n - 1)

b) The number of months that it will take to reach 200 lights is

200 = 136 + 6(n - 1)

200 - 136 = 6(n - 1)

64 = 6(n - 1)

6n - 6 = 64

6n = 64 + 6 = 70

n = 70/6 = 11.66

Approximately 12 months

3 0

3 years ago

If the vertices of triangle bcd are b(-3,3), c(3,5), and d(-1,0), what is the perimeter

zloy xaker [14]

Distance formlula
D= $\sqrt{(x2-x1)^{2}+(y2-y1)^{2}}$

when you want to find the distance between points (x1,y1) and (x2,y2)

we nee
distace from
b to c
c to d
d to b

b to c is (-3,3) to (3,5)
D= $\sqrt{(3-(-3))^{2}+(5-3)^{2}}$ =2√10

c to d is (3,5) to (-1,0)
D= $\sqrt{(-1-3)^{2}+(0-5)^{2}}$ =√41

d to b is (-1,0) to (-3,3)
D= $\sqrt{(-3-(-1))^{2}+(3-0)^{2}}$ =√13

add

b to c+c to d+d to b=2√10+√41+√13

perimiter=2√10+√41+√13 units

7 0

3 years ago