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3 years ago

Value of this equation 1.50(8x-12)=30

Mathematics

2 answers:

loris [4]3 years ago

7 0

Answer:

x=4

Step-by-step explanation:

Natali5045456 [20]3 years ago

4 0

Answer: x = 4

Work: First, you must distribute the 1.50 to 8x and -12. The new equation you get after doing so is 12x - 18 = 30. Next, we are going to add 18 on both sides, cancelling on the side it was currently on. After cancelling, we get 12x = 48. Divide 12 on both side, and again cancelling on this side it's currently on, and you get x = 4.

Check: 1.50(8(4)-12) = 30. (After solving, you get 30) (check)

I hope this helps, and Happy Holidays! :)

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Which pair of points have a slope of -3/5?

Allushta [10]

Answer:

No of these answers has a slope of $\frac{-3}{5}$ . My guess is B becasue its close to $\frac{-3}{5}$ unless the 5 is supposed to be negative

Step-by-step explanation:

You have to use the slope formula $\frac{y_{2} - y_{1} }{x_{2} - x_{1} }$

( $x_{1}$ , $y_{1}$ ), ( $x_{2}$ , $y_{2}$ )

(4, 0), (-2, 10) $\frac{10 - 0 }{-2 - 4 }= \frac{10}{6}$ you have to simplfy, the answer will be $\frac{5}{3}$

(10, -2), (0, 4) $\frac{4 - -2 }{0- 10 }= \frac{6}{-10}$ you have to simplfy, the answer will be $\frac{3}{-5}$

(4, 2), (10, 4) $\frac{4 - 2 }{10 - 4 }= \frac{2}{6}$ you have to simplfy, the answer will be $\frac{1}{3}$

(-4, -10),(0, -2) $\frac{{-2- -10} }{0 - -4 }= \frac{8}{4}$ you have to simplfy, the answer will be $\frac{2}{1} =2$

5 0

3 years ago

A ribbon is 4 m long. How many pieces each 30 cm long can be cut from the ribbon?

EleoNora [17]

Answer:

13 pieces

Step-by-step explanation:

First we convert 4m into cm :

1m = 100cm

4m = 400cm

Now we need to figure out how many 30s go into 400 :

400 ÷ 30 = 13 remainder 10

So 13 pieces can be cut from the ribbon

Hope this helped and have a good day

5 0

2 years ago

Read 2 more answers

for these scenarios, write equations or inequalities that reflect the relationship. The minimum number of hours required to rent

IgorLugansk [536]

Answer:

$100 + 35x \geq 280$ is the inequality that reflect the relationship.

Step-by-step explanation:

Given:

Charge for rental = $100

Additional charge = $ 35

Minimum amount that can be spent = $280

To Find:

equations or inequalities that reflect the relationship = ?

Solution:

Let x be the minimum number of hours

then the charge will be

100 + (number of hours)(additional cost per hour)

That is

100 + 35x

Now the minimum charge amount is $280 So, The charge can be 280 or more than 280

$100 + 35x \geq 280$

3 0

3 years ago

X+y+z =4

cestrela7 [59]

Akar akar persamaan kuadrat 2x² - 3x -1 = 0 adalah x1 dan x2. Persamaan kuadrat baru yang akar akarnya satu lebih kecil dari dua kali akar akar persamaan kuadrat di atas adalah ........A.x² - x - 4 = 0B.x² + 5x - 4 = 0C.x² - x + 4 = 0D.x² + x + 4 = 0E.x² - 5x - 4 = 0Jawaban : A
Penyelesaian :
Akar-akar persamaan lama : x1 dan x2

Akar-akar persamaan baru : xA dan xB
 xA = 2x1 - 1
 xB = 2x2 - 1
 xA + xB = (2x1 - 1) + (2x2 - 1)
 = 2 (x1 + x2) - 2
 = 2 () - 2
 = 3 - 2
 xA + xB = 1

 xA . xB = (2x1 - 1) (2x2 - 1)
 = 4 x1.x2 - 2(x1 + x2) + 1
 = 4.(-) - 2() + 1
 = -2 - 3 + 1
 xA . xB = -4

Jadi persamaan kuadrat baru : x² - (xA + xB)x + xA . xB = 0
 x² - x - 4 = 0

4 0

4 years ago

I only need number 1 i don’t understand.

valentinak56 [21]

Answer:

Step-by-step explanation:

in this problem there is A+b=15

A=9

B=12

5 0

3 years ago