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2 years ago

Solve for x. -1/5 (x - 4) = -2 Enter your answer in the box. x = ________

Mathematics

2 answers:

Lena [83]2 years ago

6 0

Answer: x=14

Step-by-step explanation:Simplify both sides of the equation(Distribute),Subtract 4/5 from both sides.Multiply both sides by 5/(-1).

lawyer [7]2 years ago

4 0

X = 14 . simplify both sides of equation , subtract , then multiply

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Donna found a sale on bags of pecans. The sale was for 4 bags of pecans for $10. How much did it cost for 1 bag of pecans?

vivado [14]

Answer:

10/4 = 2.5

One bag of pecans costs $2.5

Step-by-step explanation:

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3 years ago

The two triangles are similar what is the value of x? <br> x=___

Dennis_Churaev [7]

Answer:

Step-by-step explanation:

What we have to know is that when two triangles are similar their sides will always be proportional. So we will create a proportion that goes like this... $\frac{\Delta1side}{\Delta1base} =\frac{\Delta2side}{\Delta2base}$ but since it doesn't tell us the exact value of triangle 1. We will have to add 3 and 12 to get 15 which is the base of the first triangle. Now we're ready to write the proportion.

$\frac{4x}{15}=\frac{3x+1}{12}$

Now we cross multiply and solve the equation...

$48x=15(3x+1)\\48x=45x+15\\3x=15\\x=5$

So the value of x is 5.

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2 years ago

Solve the initial value problem yy′+x=x2+y2‾‾‾‾‾‾‾√ with y(1)=8‾√. To solve this, we should use the substitution u= x^2+y^2 help

leva [86]

Looks like the equation is

$yy'+x=\sqrt{x^2+y^2}$

Substitute $u(x)=x^2+y(x)^2$ , so that $u'=2x+2yy'$ . Then the equation is the same as

$\dfrac{u'-2x}2+x=\sqrt u\implies u'=2\sqrt u\implies\dfrac{\mathrm du}{2\sqrt u}=\mathrm dx$

Integrate both sides to get

$\sqrt u=C\implies\sqrt{x^2+y^2}=C$

Given that $y(1)=\sqrt8$ , we have

$\sqrt{1^2+(\sqrt8)^2}=C\implies C=3$

so the solution is

$\sqrt{x^2+y^2}=3$

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2 years ago

What is the solution to the inequality -6+ | 2p+3 | >7?

KengaRu [80]

Answer:

Step-by-step explanation:

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3 years ago

Read 2 more answers

The nile river, the longest river in the world, is 66.7x100 kilometers long. What is the nile's length?

kvasek [131]

Well if you multiply 66.7 x 100 you get 6,670.0. When multiplying by numbers like 10, 100, 1,000, etc, just simply transfer the 0's. So in this case, there are 2 0's in 100, so you add 2 of the 0's behind 66.7. So when you add the 2 of the 0's you get 6,670.0 which should be your answer.

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3 years ago