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padilas [110]
3 years ago
14

Help! i can’t figure this out!

Mathematics
2 answers:
Lunna [17]3 years ago
8 0
X=36 because 1/3 times 36 equals 12
Vlada [557]3 years ago
6 0

The answer is x=36 and I will teach you how to slove for it.

Steps:

\frac{1}{3}x+9=21 \\ \\\mathrm{Subtract\:}9\mathrm{\:from\:both\:sides} \\\frac{1}{3}x+9-9=21-9 \\ \\\mathrm{Simplify} \\\frac{1}{3}x=12

So yes you have done everything right up to this point, but you missing a step

\mathrm{Multiply\:both\:sides\:by\:}3: \\3\cdot \frac{1}{3}x=12\cdot \:3

All whole numbers that we work with in math are really just \frac{Any\ Number}{1} So we cross multiply 3, aka:\frac{3}{1} by \frac{1}{3}

\frac{3}{1} *\frac{1}{3} = 1 and also 12*3=36

Now if we simplify we are just left with x=36

If you find anything wrong with my answer just let me know, and I can guarantee that I will come back and rework my math. Thanks! :-)

Ps. Brainiest is always a nice touch

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Hi guys<br>I need 3 minus and plus operations with answer thx!​
nata0808 [166]

1999+1001=3000 1091+1009=3000 2000+1000=3000

3000-1001=1999 3000-1009=1091 3000-2000=1000

8 0
2 years ago
What is the value of x?
Phantasy [73]

Answer:

value of x = 5.8 mm

Step-by-step explanation:

We have given,

Two right triangles EDH and EDG.

In right triangle EDH, EH = 56mm , DH = 35 mm

Using Pythagoras theorem we can find ED.

i.e EH² = ED²+DH²

56²=ED²+35²

ED²=56²-35²

ED = √(56²-35²) = 7√39 = 43.71 mm

Now, Consider right triangle EDG

Here, EG=44.8mm , GD = x+4  and ED = 7√39

Again using Pythagoras theorem,

EG² = ED² + DG²

44.8²= (7√39)²+ (x+4)²

(x+4)² = 44.8² - (7√39)²

x+4 = √(44.8² - (7√39)²)

x+4 = 9.8

or x = 9.8 - 4 = 5.8 mm

Hence we got the value of x = 5.8 mm

6 0
3 years ago
If a+b+c=0 for a,b,c then prove a²/bc+b²/ca+c²/ab=3.
Ierofanga [76]
According to the identity if a+b+c=0
then a3+b3+c3=3abc
a3+b3+c3/abc=3
a2*a/bc*a+b2*b/ca*b+c2*c/ab*c=3
cancel a,b,c in   all the fraction then you get
<span>a²/bc+b²/ca+c²/ab=3. 
</span>hence proved


5 0
3 years ago
Sue has $2.10 in dimes and nickels. If she has 12 more dimes than nickels, how many of each coin does she have?
Andreas93 [3]
Sue would have 21 dimes and 12 less of 21 is 9, so sue has 9 nickels

dimes: 21
nickels: 9
8 0
3 years ago
4 ten thousands 4 thousands time 10
damaskus [11]
44,000 *10
440,000

when multiplying by ten, add one more zero to the end of the number
5 0
2 years ago
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