All categories

2 years ago

Please help giving BRAINLYEST

Mathematics

2 answers:

scoundrel [369]2 years ago

6 0

Answer:

Last one:

2 x + 4 y = 6. 3 x minus 4 y = 9.

Step-by-step explanation:

2x + 4y = 6

3x - 4y = 9

4y = 3x - 9

2x + 3x - 9 = 6

5x = 15

x = 3

4y = 3(3) - 9

4y = 0

y = 0

Only one solution, which is (3,0)

likoan [24]2 years ago

5 0

Answer:

2x+4y =6

3x -4y =9 one solution

Step-by-step explanation:

4x+2y =8

-4x-2y =3

Adding these together

0 =11 False no solutions

-5x +y =6

5x -y = -6

Adding these together

0 = 0 True we get Infinite solutions

-3x+4y =2

3x-4y =0

Adding these together

0=2 False no solutions

2x+4y =6

3x -4y =9

Add these together

5x =15

Divide by 5

5x/5 = 15/5

x =3

2(3) +4y =6

10 +4y =6

4y = 0

y = 0

(3,0)

One solution

You might be interested in

I need help on this question pls

Ivanshal [37]

Answer:

t = 17.5 f = 12

Step-by-step explanation:

If <em>MNOP </em>is a square, you know that each angle is going to be 90°. To solve, let's first set each equation equal to 90°:

$90 = 4t + 20$

and

$90 = 7f + 6$

Then solve both equations:

$90 = 4t + 20 \\ 70 = 4t \\ 17.5 = t$

and

$90 = 7f + 6 \\ 84 = 7f \\ 12 = f$

I hope that helps!

7 0

2 years ago

What is the average rate of change for h(t) between t=0 and t=2

nordsb [41]

Part a: Option D 18 feet per second

Part b: increasing

Solution:

Height $h(t)=-16 t^{2}+50 t+3$

Part a: To find the average rate of change for h(t) between t = 0 and t = 2.

Substitute t = 0 in h(t).

$h(0)=-16 (0)^{2}+50 (0)+3$

h(0) = 3

Substitute t = 2 in h(t).

$h(2)=-16 (2)^{2}+50 (2)+3$

h(2) = 39

Average rate of change formula:

$$=\frac{h(b)-h(a)}{b-a}$

Here, a = 0 and b = 2.

$$=\frac{h(2)-h(0)}{2-0}$

$$=\frac{39-3}{2}$

$$=\frac{36}{2}$

= 18

Average rate of change = 18 feet per second

Option D is the correct answer.

Part b:

This means height of the ball is increasing for 0 < x < 2.

6 0

3 years ago

Given the sequence 8, 12, 16, 20, 24, what is the sum of the 31st and 19th terms?

erica [24]

Answer:

First term (a) =8

Common difference (d)= t2-t1

=12-8

Now, sum of first 31th term (tn31) =n/2{2a+(n-1)d}

= 31/2{2×8+(31-1)4}

=31/2{16+(30×4)

=31/2(16+120)

=31/2×126

=31×63

Step-by-step explanation:

Similarly use 19 as (n) for the 19th term

7 0

2 years ago

What is the greatest factor of 52 that is a prime number?

alexandr1967 [171]

The greatest factor is 52 that is a prime number is 13.

4 0

3 years ago

I need some help with this.

ohaa [14]

Answer:

that is crazy i have not idea what the answer is

Step-by-step explanation:

4 0

3 years ago