All categories

4 years ago

What Is 7 subtracted from a number if “A Number” is x

Mathematics

1 answer:

julia-pushkina [17]4 years ago

3 0

X-7 is the answer because youre taking seven from a variable

You might be interested in

Mai and Tyler work on the equation 2/5b+1=-11 together. Mais soulution is b=-25 and Tyler’s is b=-28. Here is their work. Do you

Anika [276]

Answer:

No I don't agree with their solution; both their answers are wrong.

Correct answer is $b=-30$ .

Step-by-step explanation:

Given:

$\frac{2}{5}b+1=-11$

Now given:

According to Mai $b = -25$ and According to Tyler $b = -28$

Now we need to find which of them is correct.

So we will solve the given equation we get;

$\frac{2}{5}b+1=-11$

Subtracting both side by 1 we get;

$\frac{2}{5}b+1-1=-11-1\\\\\frac{2}{5}b =-12$

Now Multiplying both side $\frac{5}{2}$ we get;

$\frac{2}{5}b\times\frac{5}{2}= -12 \times \frac{5}{2}\\\\b=-6\times 5\\\\b=-30$

Hence both of them are incorrect, correct answer is $b=-30$ .

3 0

3 years ago

Someone please help math question?ASAP

natali 33 [55]

A I am pretty sure. I apologize if I am incorrect.

3 0

3 years ago

What is the solution of the system? Use substitution. x - y = -6 6x - 3y = -9

elena-14-01-66 [18.8K]

Answer:1.5,-1.5

Step-by-step explanation:

I just answered it

3 0

3 years ago

$4,000 is invested at 3% interest. How much money must be invested at 5% interest so that the total interest from the two invest

Leviafan [203]

Your answer is 1500$ have a nice day!

3 0

3 years ago

A boy has a lemonade stand with a cash box that has 22 coins in it. If the coins are made up of nickles and

bonufazy [111]

Answer:

$Nickels: 13\\\\Half\ dollars:9$

Step-by-step explanation:

Let be "n" the number of nickels the boy has in the cash box and "h" the number of half dollars the boy has in the cash box.

Set up a system of equations:

$\left \{ {{n+h=22} \atop {0.05n+0.5h=5.15}} \right.$

You can use the Elimination method to solve the system. Multiply the first equation by -0.5, add both equations and then solve for "n":

$\left \{ {{-0.5n-0.5h=-11} \atop {0.05n+0.5h=5.15}} \right.\\...........................\\-0.45n=-5.85\\\\n=\frac{-5.85}{-0.45}\\\\n=13$

Finally, substitute the value of "n" into the first equation and solve for "h":

$13+h=22\\\\h=22-13\\\\h=9$

8 0

4 years ago