All categories

3 years ago

4x-y=18 6x+4y=38 me ajudem

Mathematics

1 answer:

allsm [11]3 years ago

7 0

Y =14 in the first equation , and in the second equation its y=8

You might be interested in

What is the length, width, and area

Temka [501]

Length: 6 Width: 2 Area: 12

4 0

2 years ago

“I think of a number, multiply it by 2, subtract 3 and multiply the result by 4."

Scorpion4ik [409]

Answer:

33x2=66

66-3=62

62x4=248

Is this a question for a test cause if it is i'm gonna feel embarrassed

5 0

2 years ago

Mr. Bryan's class has 60 students. 1 4 of the students stay for tutoring on Monday. If Mr. Bryan equally divides the students th

exis [7]

Answer:

Step-by-step explanation:

You have to divided by 5 but you will get 2.8. But if you round it it will come out to be 3.

3 0

2 years ago

Read 2 more answers

victor needs 30 feet of rope. the rope he want to buy is sold by the yard. he know that there are 3 feet in the 1 yard. how many

solmaris [256]

Answer: 10 yards

Step-by-step explanation:

Covert 30 feet into yards to find how many yards he should buy.

$\frac{30}{3} = \frac{x}{1}$ Solve by cross product

3x = 30

x = 10

3 0

3 years ago

In a geometric sequence, a4 = 54 and a7 = 1,458. what is the 12th term? <br><br> answer: B) 354,294

slamgirl [31]

Option B:

The 12th term is 354294.

Solution:

Given data:

$a_4=54$ and $a_7=1458$

To find $a_{12}:$

The given sequence is a geometric sequence.

The general term of the geometric sequence is $a_n=a_1\ r^{n-1}$ .

If we have 2 terms of a geometric sequence $a_n$ and $a_k$ (n > K),

then we can write the general term as $a_n=a_k\ r^{n-k}$ .

Here we have $a_4=54$ and $a_7=1458$ .

So, n = 7 and k = 4 ( 7 > 4)

$a_7=a_4\ .\ r^{7-4}$

$1458=54\ . \ r^3$

This can be written as

$$r^3=\frac{1458}{54}$

$$r^3=27$

$$r^3=3^3$

Taking cube root on both sides of the equation, we get

r = 3

$a_{12}=a_7\ .\ r^{12-7}$

$=1458\ .\ r^5$

$=1458\ .\ 3^5$

$a_{12}=354294$

Hence the 12th term of the geometric sequence is 354294.

7 0

2 years ago