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Elena L [17]
3 years ago
6

Solve this equation: 2/5(x-2)=-1 Please get me the answer ASAP

Mathematics
1 answer:
Darina [25.2K]3 years ago
3 0

Answer:

Step-by-step explanation:

Distribute 2/5 through the parentheses

2/5x-4/5=-1

multiply both sides by 5

2x-4=-5

move the constant to the right and change the sign

2x=-5+4

add the sum

2x=-1

divide both sides by 2

x=-1/2

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Consider the rational number, −0.4. Is the number greater than −2 and 1/3 but less than 4/5 ?
8_murik_8 [283]

Answer:

No

Step-by-step explanation:

Since the rational number -0.4 is a negative, it cannot have a greater value than 1/3 since it is a positive.

Though, the rest of the sentence is true.

-0.4 > -2

-0.4 < 4/5

3 0
3 years ago
two friends have a conversation mario tells roberto "the money i have is twice that you have" roberto answer "if you give me 6 d
crimeas [40]

Answer:

Before anyone gives anyone money, Mario has 24 dollars and Roberto has 12 dollars. After they give each other money, both of them have 18 dollars.

Step-by-step explanation:

Mario has twice as much as Roberto, BUT if Mario gives Roberto 6 dollars, then they have the same amount.

M = 2R

M - 6 = R + 6

To isolate M, you need to add 6 on both sides.

M - 6 + 6 = R + 6 + 6

M = R + 12

M = 2R

Substitute M for the value above that we found.

R + 12 = 2R

Now we subtract R on both sides, so that only one side has the variable R.

R - R + 12 = 2R - R

12 = R

M = 2R

Substitute for the value of R.

M = 2 x 12

M = 24

3 0
2 years ago
Is it possible to factor x cubed?
liberstina [14]
I dont think so.
factoring means make simpler
x cubed is already is simple so i dont think you cant. correct me if i am wrong
7 0
3 years ago
The scores on a quiz are normally distributed. The mean of the quiz is 93 and the standard deviation is 4.2. By using the Empiri
xz_007 [3.2K]

Answer:

any score that lies between 88.8 and 97.2 is within one std. dev. of the mean

Step-by-step explanation:

One std. dev. above the mean would be 93 + 4.2, or 97.2.  One std. dev. below the mean would be 93 - 4.2, or 88.8.

So:  any score that lies between 88.8 and 97.2 is within one std. dev. of the mean.

6 0
3 years ago
Need help wit home work pl...<br>​
Mariulka [41]

Answer:

Step-by-step explanation:

I will help you just tell me what grade your in and i will help

5 0
3 years ago
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