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3 years ago

Solve for x. 5(x – 10) = 30 – 15x x = 1 x = 4 x = 5 x = 8

Mathematics

2 answers:

cluponka [151]3 years ago

8 0

X=4 is the correct answer.

Andrej [43]3 years ago

5 0

Answer:

Option B that is x=4 is correct

Explanation:

We have been given an equation 5(x-10) = 30 -15x

we will solve left hand side by opening the parenthesis we will get 5x -50 on left hand side of the equation finally our equation will become

5x - 50 =30 -15x

Taking terms with variables at one side and constant on the other side we will get

5x+15x = 30+50

After solving above equation we will get

20x=80

Hence, x=4

Therefore, Option 2 is correct

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Working alone, shayna can harvest a field in 8 hours. John can harvest the same field in 16 hours. How long would it take them i

Alinara [238K]

(1/8)x + (1/16)x = 1
(2/16)x + (1/16)x = 1
(3/16)x = 1
x = 16/3 = 5.33333 hrs

7 0

3 years ago

-4x + y = -9 - 5x + 2y = 3 : Solve the Linear equation

Yuri [45]

-4x+y= -9 can be turned into
y= -9 + 4x

5x+2y=3 (plug y in)
5x+2(-9+4x)=3
5x-18+8x=3
5x+8x=3+18
13x=21
divide 13 on both sides
x=1.6

6 0

2 years ago

a small dog’s heart beats about 530,000,000 times during its lifetime, and a large dog’s heart beats about 1.4 times this amount

iren2701 [21]

Answer:

I think the answer is 742,000,000

Step-by-step explanation:

6 0

3 years ago

I need help with this I got -10 is it right??

Dahasolnce [82]

Answer:

-14

Step-by-step explanation:

difference between -20 and -5 = 15

15 x 2/5 = 30/5 = 6

-20 + 6 = -14

7 0

3 years ago

Which situation can be modeled by the inequality 50 - 12x > 8?

eduard

Answer:

Option D.

Step-by-step explanation:

Borrowed $50 from your cousin. You pay him $8 and must pay him back within 12 weeks.

Let x be the amount paid on each week.

$50-8\leq 12x$

$50-12x\leq 8$

You can buy bags of pretzels in packages of 12. You $50 to spend, but want to have at least $8 left.

Let x be the amount of each package.

$50-12x\geq 8$

You owe your sister $50. You plan to pay her $12 a week till you owe her less than $8.

Let x be the amount paid on each week.

$50-12x$

You have $50 to spend on clothes, but you need to save at least $8 for bus fare. You plan to spend the rest on shirts that cost $12 each (including tax).

Let x be the number of shirts

$50-12x>8$

Therefore, the correct option is D.

7 0

3 years ago