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shepuryov [24]
3 years ago
11

I have no clue why it is making me do this

Mathematics
1 answer:
Citrus2011 [14]3 years ago
6 0

Answer:

Option B) The simplification performed in step 2 is invalid or incorrect

The value of w in the given expression is -54

Step-by-step explanation:

Option B) The simplification performed in step 2 is invalid or incorrect

The corrected steps are given below :

GIven expression is w+xy+3x^2=2 and x=2y

To find w when y=-2 :

Step 1: I first substitute y=-2 into x=2y yielding x=2(-2)

Step2: I simplify the expression resulting in x=-4

Step3: I substitute x=-4 and y=-2 into the given expression w+xy+3x^2=2 we get

w+(-4)(-2)+3(-4)^2=2

Step 4: I use order of operations to simplify and get

w+8+3(16)=2

w=2-56

Therefore w=-54

The value of w in the given expression is -54

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The triangles are similar.
son4ous [18]

Answer:

x = 21

Step-by-step explanation:

Using ratios:

75 : 25 = x : 7

75/25 = x/7

3 = x/7

21 = x

Using Pythagoras' Theorem a² + b² = c², where a and b are the legs and c is the hypotenuse of a right triangle:

72^2+x^2=75^2

\implies x^2=75^2-72^2

\implies x=\sqrt{75^2-72^2}

\implies x=21

3 0
2 years ago
Bobbi can mow the park in 3 hours and Deshaun can do the same job in 7 hours. How long will it take them to mow the park
Bogdan [553]

Answer:

2.1 hours (2 hours and 6 minutes)

Step-by-step explanation:

The rate of work of Bobbi is ⅓ while for Deshaun is 1/7 hence combined rate will be

⅓+1/7=(7+3)/21=10/21

The equivalent hours is the reciprocal of the above hence 1021/10=2.1 hours

0.1 of an hour is equivalent to 0.1*60=6 minutes

Therefore, the efforts combined will take 2.1 hours or 2 hours and 6 minutes

7 0
3 years ago
Find the 81st term of the arithmetic sequence -28, -34, -40, ...
balu736 [363]

The 81th term is -476

Step-by-step explanation:

5 0
4 years ago
Find the solution to the differential equation dx/dy+y/3=0 subject to the initial conditions y(0)=12.
ycow [4]
\dfrac{\mathrm dx}{\mathrm dy}+\dfrac y3=0\iff\mathrm dx=-\dfrac y3\,\mathrm dy
\implies\displaystyle\int\mathrm dx=-\frac13\int\mathrm y\,dy
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Given that y(0)=12, we have

0=-\dfrac16(12)^2+C\implies C=24

So the particular solution to the initial value problem is

x=-\dfrac16y^2+24\iff y^2=144-6x
8 0
3 years ago
A rectangular prism has a length of 414 in., a width of 3 in., and a height of 114 in.
pshichka [43]
I would say B. Volume = L x W x H
5 0
4 years ago
Read 2 more answers
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