All categories

4 years ago

Difference of a number and -3 is 6. what is the number

1 answer:

5 0

Let x = the number we are looking for:

Difference means that we subtract:

$x-(-3)=6$

Two negative signs turn it into one positive sign (a plus):

$x+3=6$

We need to get x by itself, so we subtract 3 from both sides:

$x=3$

So now we know that the number we were asked to find is 3.

You might be interested in

Find the total surface area of this cuboid.

-Dominant- [34]

Step-by-step explanation:

I just learned this in class lol

Find the area of all the sides.

This cubiod has 6 sides.

6 x 5 = 30

4 x 5 = 20

6 x 4 = 24

30 + 30 + 20 + 20 + 24 + 24 = 148

Thefore, the surface area of this cuboid is 148.

Hope this helps! If it did, please mark it as brainliest! It would help a lot! Thanks! :D

8 0

3 years ago

This question is really hard only big brain can solve this what is 1+1

Anna71 [15]

Answer:2

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

43 coins, no nickels, $4.51 equal amount amount of pennies and dimes, how many of each coin

Sonbull [250]

Set up
Let the dimes = d
Let the pennies = p
Let the quarters = q

Equations
You cannot mean that the pennies and dimes have equal numbers. That would mean that each had 21.5 members. Now could you mean that the dime and penny amount could be the same with 43 coins that total 4.00. Four dollars means that you need 40 dimes alone. It must mean that you are including quarters.

p + d + p = 43 (1)
p = d (2)
p +10d +25q = 451 (3)

Note how this last equation = was derived. You have to multiply the dimes by 10 and he quarters by 100 and the total by 100 to get the numbers all in pennies.

Put the results of 2 into 1.
2p + q = 43 (4)
You need to modify equation 3 as well.
p + 10p + 25q = 451
11p + 25q = 451 (5)

Solve the new equations
2p + q = 43 (4)
11p + 25q = 451 (5)

Multiply 4 by 25
25(2p- + q = 43)
50p + 25q = 1075 (6) Subtract (5) from (6)
<u>11p + 25q = 451
</u>39p = 624 Divide by 39
p = 624 / 39
p = 16

Since the pennies and dimes are equal there are 16 dimes
p + d + q = 43
16 + 16 + q = 43
32 + q = 43
q = 11

Check
16 + 10*16 + 11*25 = ?
16 + 160 + 275 = ?
451 = ?

Nice problem. Thanks for posting.

3 0

4 years ago

Machine M, working alone at its constant rate, produces x widgets every 4 minutes. Machine N, working alone at its constant rate

Harman [31]

Answer:

Yes

Step-by-step explanation:

Given that Machine M, working alone at its constant rate, produces x widgets every 4 minutes. Machine N, working alone at its constant rate, produces y widgets every 5 minutes.

When both machines work for 20 minutes

Machine A would produce = $\frac{20}{4} =5$ widget and

Machine B would produce = $\frac{20}{5} =4$ widgets

So we can say that Machine A would produce more widgets than Machine N at that time.

Answer is Yes

8 0

3 years ago

one end of a ten- foot ladder is four feet from the base of a wall . how high on the does the top of the ladder touch ??

Jet001 [13]

Answer:

9,2 feet

Step-by-step explanation:

Use the Pythagorean theorem: height= sqrt(10^2-4^2)= sqrt(84) =9,2 ~

sqrt Is Square root btw

8 0

3 years ago