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3 years ago

Which of these is the algebraic expression for "seven less than some number?" Fraction 7 over h Fraction h over 7 h − 7 7 − h

Mathematics

2 answers:

Olin [163]3 years ago

6 0

Let's assume the some number be h.

Now the given statement is "seven less than some number".

Which means we need to take out 7 from h. Hence, it can be translate into an algebraic expression as h-7.

Lady bird [3.3K]3 years ago

4 0

Answer: h − 7

Step-by-step explanation:

Hi, to answer this question we have to analyze the information given:

Some number will be represented with the letter h.

So, seven less means that we have to subtract seven to "some number" (h)

Mathematically speaking:

h-7

The correct option is h-7

Feel free to ask for more if needed or if you did not understand something.

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the labelled price of a bag is Rs1,580. If 5% discount is allowed, calculate the selling price of the watch.solve it

Ipatiy [6.2K]

Step-by-step explanation:

If there 5% is allowed in Rs 1,580 than the selling price of the watch is 1,501

7 0

3 years ago

Evaluate the integral Integral ∫ from (1,2,3 ) to (5, 7,-2 ) y dx + x dy + 4 dz by finding parametric equations for the line seg

n200080 [17]

$\vec F(x,y,z)=y\,\vec\imath+x\,\vec\jmath+3\,\vec k$

is conservative if there is a scalar function $f(x,y,z)$ such that $\nabla f=\vec F$ . This would require

$\dfrac{\partial f}{\partial x}=y$

$\dfrac{\partial f}{\partial y}=x$

$\dfrac{\partial f}{\partial z}=3$

(or perhaps the last partial derivative should be 4 to match up with the integral?)

From these equations we find

$f(x,y,z)=xy+g(y,z)$

$\dfrac{\partial f}{\partial y}=x=x+\dfrac{\partial g}{\partial y}\implies\dfrac{\partial g}{\partial y}=0\implies g(y,z)=h(z)$

$f(x,y,z)=xy+h(z)$

$\dfrac{\partial f}{\partial z}=3=\dfrac{\mathrm dh}{\mathrm dz}\implies h(z)=3z+C$

$f(x,y,z)=xy+3z+C$

so $\vec F$ is indeed conservative, and the gradient theorem (a.k.a. fundamental theorem of calculus for line integrals) applies. The value of the line integral depends only the endpoints:

$\displaystyle\int_{(1,2,3)}^{(5,7,-2)}y\,\mathrm dx+x\,\mathrm dy+3\,\mathrm dz=\int_{(1,2,3)}^{(5,7,-2)}\nabla f(x,y,z)\cdot\mathrm d\vec r$

$=f(5,7,-2)-f(1,2,3)=\boxed{18}$

8 0

3 years ago

Solve this quadratic equation by completing the square.

nadya68 [22]

Answer:

$x=-3+\sqrt{27}\\ x=-3-\sqrt{27}$

Step-by-step explanation:

Let's find our C value for the quadratic equation.

$(\frac{6}{2})^{2} = 9$

That is our C. Since we added 9 to one side, we have to do the same to the other. We get:

$x^{2} +6x + 9 = 18 + 9\\x^{2} +6x + 9 = 27$

Now, lets form the left side as a binomial squared.

$(x+3)^{2} = 27$

Let's square both sides now:

$x+3 = (+/-)\sqrt{27}$

Now, we subtract 3 from both sides to isolate the variable, X:

$x= -3(+/-)\sqrt{27}$

This means that the answers are:

$x=-3+\sqrt{27}\\ x=-3-\sqrt{27}$

I do not understand your answers though. Answer A makes no sense, answer B is 221, answer C is 115, and answer D also does not make sense. If you could clarify this portion, maybe I can help you find your alphabetic answer

3 0

3 years ago

DOES ANYONE KNOW THE ANSWER ???? Please I can’t fail this test !

Zigmanuir [339]

Answer:

The last option

Step-by-step explanation:

You take the middle 2 numbers, add them up, and divide by 2.

6 0

2 years ago

What is the value of (-14^0)^-2?

Ainat [17]

Answer:

-6

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers