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zavuch27 [327]
3 years ago
7

-2x=-x-3 I don't know how to solve it

Mathematics
1 answer:
Reil [10]3 years ago
5 0

Answer:

<h2>x = 3</h2>

Step-by-step explanation:

-2x=-x-3\qquad\text{add}\ x\ \text{to both sides}\\\\-2x+x=-x+x-3\\\\-x=-3\qquad\text{change the signs}\\\\x=3

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I = Prt
Olegator [25]

Answer:

r=3.5\%

Step-by-step explanation:

we know that

The simple interest formula is equal to

I=P(rt)

where

I is the Final Interest Value

P is the Principal amount of money to be invested

r is the rate of interest  

t is Number of Time Periods

in this problem we have

t=5\ years\\ P=\$1,200\\ I=\$210\\r=?

substitute in the formula above

210=1,200(5r)

solve for r

r=210/6,000

r=0.035

convert to percentage (multiply by 100)

r=3.5\%

6 0
3 years ago
Find the value of x and y in the diagram below 9 30 degrees
Leya [2.2K]

Answer:

not enough information.

Step-by-step explanation:

5 0
3 years ago
Vivian draws three right triangles. In each figure, she measures a pair of angles, as shown.
Usimov [2.4K]

acute angles are complementary



3 0
3 years ago
Read 2 more answers
The incline of a roller coaster is 2 times as long as its elevation, and the horizontal length of the roller coaster is 11 m mor
Gelneren [198K]
Let 
x-------> t<span>he horizontal length of the roller coaster
y------> </span>the elevation of the roller coaster
c------> t<span>he incline of a roller coaster
</span>
we know that
applying the Pythagoras theorem
c²=x²+y²-----> equation 1
c=2y-----> equation 2
x=11+y----> equation 3

substitute equation 2 and equation 3 in equation 1
[2y]²=(11+y)²+y²
4y²=11²+22y+y²+y²
2y²-22y-121=0

using a graph tool-----> to resolve the second order equation
see the attached figure

the solution is 
y=15.026 m

c=2*y-----> c=2*15.026----> c=30.052 m

the answer is
30.05 m


7 0
3 years ago
10 cm
kirza4 [7]
Um can we see the cylinder
7 0
3 years ago
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