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4 years ago

5 1/3 times x=2/3 What is x?

Mathematics

2 answers:

Alla [95]4 years ago

7 0

I think the answer would be the 0.039.

Artist 52 [7]4 years ago

3 0

The answer is 3.5 repeating.

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Complete the solution of the equation. find the value of y when x equals 4 -3x +9y = -57

Kazeer [188]

Answer:

y = -5

Step-by-step explanation:

-3x +9y = -57

Let x = 4

-3*4 +9y = -57

-12 +9y = -57

Add 12 to each side

-12+12 +9y = -57+12

9y = -45

Divide each side by 9

9y/9 = -45/9

y = -5

4 0

3 years ago

'What is the surface area, in square inches, of an 8-inch

scoray [572]

Surface are is length times height.
8*8=64
a cube has 6 sides
64*6=384

8 0

3 years ago

If f(x) = <img src="https://tex.z-dn.net/?f=%20x%5E%7B2%7D%20" id="TexFormula1" title=" x^{2} " alt=" x^{2} " align="absmiddle"

balu736 [363]

I'm pretty sure it'd be answer B.

6 0

3 years ago

Given that x and y are positive integers and (x·2)+x(2^2)+(y·2^3)+(y·2^4)=42, what is the value of xy?

Alex_Xolod [135]

I am gonna try my best to explain this to you :)

Firstly what you need to do is simplify the equation

$(x*2)+x(2^2)+(y*2^3)+(y*2^4)=42\\2x+4x+8y+16y=42\\6x+24y=42$

Now it looks a little less complicated the next step is to isolate y, in order to do that we solve the equation for y

$6x+24y=42$

$24y=42-6x\\y=\frac{42-6x}{24}$ Simplify it $\frac{7-x}{4}$

Now substitute y for $\frac{7-x}{4}$

$6x+\frac{7-x}{4}=42\\4(6x)+7-x=42*4\\24x+7-x=168\\23x+7=168\\23x=168-7\\23x=161\\x=\frac{161}{23}\\x=7$

Now substitute x for 7 and solve for y

$6(7)+24y=42\\42+24y=42\\24y=42-42\\24y=0\\y=\frac{0}{42}\\y=0$

x=7 and y=0

Hope this helps :)

4 0

3 years ago

Assume that that 10% of adults are left-handed. If 200 adults are randomly selected, find the probability that 16 or fewer of

Oxana [17]

Answer:

0.2078, not unusual

Step-by-step explanation:

Given that we assume that 10% of adults are left-handed.

Let X be the no of left handed persons in the sample of 200 adults

X is binomial because X has two outcomes and each trial is independent of the other

n =200 and p = 0.10

The probability that 16 or fewer are left-handed is

= $P(X\leq 16)\\= F(16)\\=\Sigma _0^{16} 200Cx (0.10)^x (0.9)^{200-x}$

=0.2075

Since nearly 1/5 are having chance to have left hand this is not unusual.

3 0

3 years ago