All categories

3 years ago

PLEASE HELP QUESTIONS ARE BELOW FIRST TO ANSWER WILL BE VOTED BRAINLIEST

Mathematics

2 answers:

statuscvo [17]3 years ago

8 0

Answer:

1. 7.5

2. 7

3. 8

4. 1.44

5. 2

6. 4

Step-by-step explanation:

Use cross multiplication and then divide by the coefficient of x.

Here is how to solve number 1. Solve the rest of them like this.

2.5(15) = 5x

37.5 =5x

5 5

x=7.5

Please mark me brainliest and I hope this helps.

Lubov Fominskaja [6]3 years ago

3 0

Answer:

1. x = 7.5

2. x = 7

3. x = 8

4. x = 1.44

5. x = 2

6. x = 4

Step-by-step explanation:

All you have to do is cross multipy and then solve.

You might be interested in

Find the value of the expression 4a4 − 2b2 + 40 when a = 2 and b = 7.

Makovka662 [10]

4 a⁴ - 2 b² + 40 :

4 * ( 2⁴) - 2 * ( 7²) + 40 =

4 * 16 - 2 * 49 + 40 =

64 - 98 + 40 =

-34 + 40 =

+ 6

<span>hope this helps!</span>

4 0

3 years ago

Q(a+1) - 2q(a) if q(x) = x²+3x+4

siniylev [52]

$q(x) = {x}^{2} + 3x + 4$

_________________________________

Step(1)

To find q(a) we just need to put a instead of x in q(x) function.

Let's do it...

$q(a) = {a}^{2} + 3a + 4$

Multiply sides by -2 :

$- 2q(a) = - 2( {a}^{2} + 3a + 4)$

$- 2q(a) = - 2 {a}^{2} - 6a - 8$

_________________________________

Step (2)

To find q(a+1) we just need to put a+1 instead of x in q(x) function.

Let's do it...

$q(a + 1) = ({a + 1})^{2} + 3(a + 1) + 4 \\$

$q(a + 1) = {a}^{2} + 2a + 1 + 3a + 3 + 4 \\$

$q(a + 1) = {a}^{2} + 5a + 8$

_________________________________

Step (3)

$q(a + 1) - 2q(a) =$

${a}^{2} + 5a + 8 - 2 {a}^{2} - 6a - 8 = \\$

$- {a}^{2} - a = - a(a + 1)$

And we're done.

Thanks for watching buddy good luck.

♥️♥️♥️♥️♥️

8 0

4 years ago

Three divided by four

muminat

Answer:

0.75

Step-by-step explanation:

3/4=0.75

Hope this helps! :)

8 0

3 years ago

Simplify: 2cd3 (c- d+5)

sasho [114]

Answer:

2c2d3 − 2cd4 + 10cd3

hope it helps

6 0

3 years ago

she walks up 9 flights of stairs. If there are 13 steps in 1 flight of stairs, how many steps does Kay climb in 5 days at work?

Lena [83]

13 * 9
And then multiply that answer by 5.

6 0

4 years ago

Read 2 more answers