All categories

3 years ago

If you subtract 8 from 7 times a certain number, you end up with 34. what is the number?

Mathematics

1 answer:

Mkey [24]3 years ago

8 0

If we call the unknown number x, we have:

7 times a certain number is $7x$
If we subtract 8, we have $7x-8$

If this equals 34, we have

$7x-8=34$

Add 8 to both sides:

$7x=42$

Divide both sides by 7:

$x=6$

You might be interested in

5x2 + 34x – 7 = 0<br> solve by factoring

likoan [24]

Answer:

$x=\frac{1}{5} , -7$

Step-by-step explanation:

Hope this helps!

3 0

3 years ago

Find the coordinates of P so that P partitions AB in the ratio 3:4 with A(-9,-9) and B(5,-2).

ivolga24 [154]

The coordinates of point P are (-3 , -6)

Step-by-step explanation:

If point (x , y) partitions line AB where A = $(x_{1},y_{1})$ and B = $(x_{2},y_{2})$

at a ratio $m_{1}:m_{2}$ from A then:

1. $x=\frac{x_{1}m_{2}+x_{2}m_{1}}{m_{1}+m_{2}}$

2. $y=\frac{y_{1}m_{2}+y_{2}m_{1}}{m_{1}+m_{2}}$

∵ P partitions AB in the ratio 3 : 4

∴ $m_{1}:m_{2}$ = 3 : 4

∵ A = (-9 , -9) and B = (5 , -2)

- Substitute the coordinates of points A and B in the rules above

∵ $x=\frac{(-9)(4)+(5)(3)}{3+4}$

∴ $x=\frac{-36+15}{7}$

∴ $x=\frac{-21}{7}$

∴ x = -3

The x-coordinate of P is -3

∵ $y=\frac{(-9)(4)+(-2)(3)}{3+4}$

∴ $y=\frac{-36+(-6)}{7}$

∴ $y=\frac{-42}{7}$

∴ y = -6

The y-coordinate of P is -6

The coordinates of point P are (-3 , -6)

Learn more:

You can learn more about the mid-point of a segment in brainly.com/question/5223123

#LearnwithBrainly

5 0

4 years ago

Can someone help???????????

GalinKa [24]

Answer:

B. is the correct answer

4 0

3 years ago

Which of the f -values satisfy the following inequality?

pickupchik [31]

The answer would be 4.

3 0

3 years ago

Rachel invested $15,000 in a nine-year CD giving 8.5% interest, but needed to withdraw $4,000 after two years. If the CD's penal

drek231 [11]

Given:
Principal = 15,000
interest = 8.5%
term = 9 years

I = 15,000 * 8.5% * 9 years = 11,475
total amount after 9 years = 15,000 + 11,475 = 26, 475

Preterm after 2 years. wdl of 4,000. penalty is 6 months interest of 4,000

I = 4,000 * 8.5% * 6/12 = 170 amount of penalty
I = 15,000 * 8.5% * 2 years = 2,550 interest earned for 2 years

15,000 + 2,550 = 17,550
17,550 - 4,000 - 170 = 13,380 amount to be invested for another 7 years

I = 13,380 * 8.5% * 7 years = 7,961.10
total amount after 9 years with pretermination
13,380 + 7,961.10 = 21,341.10

5 0

3 years ago

Read 2 more answers

If you subtract 8 from 7 times a certain number, you end up with 34. what is the number?​

If you subtract 8 from 7 times a certain number, you end up with 34. what is the number?