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3 years ago

Determine the value of y, if x is 7. y = x2 - 1

Mathematics

2 answers:

Savatey [412]3 years ago

7 0

13 because if you plug in 7 y=7(2)-1 then do 7x2 and then it would be 14-1 so 13

ddd [48]3 years ago

4 0

Answer:

Step-by-step explanation:

If x is 7, then 7 * 2 = 13, and 14 - 1 = 13.

Hope that this helps!

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Aloiza [94]

Answer:

11. c

12. c

Step-by-step explanation:

11. Since Angle RST = 60 degrees, Angle RTS = 60 degrees.

Triangle STU is a right triangle, so Angle STU and Angle SUT are both 45 degrees.

Angle RTS + Angle STU + Angle UTQ = 180 degrees

60 + 45 + Angle UTQ = 180

Angle UTQ = 180 - 105

= 75 degrees

12. Using the corresponding angles theorem, x = 45 degrees and y = 35 degrees.

x + y

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2 years ago

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which set of numbers can represent the side lengths, in centimeters, of a right triangle?a. 8,12,15b. 10,24,26c. 12,20,25d. 15,1

Mama L [17]

Answer:

Step-by-step explanation:

Pythagorean theorem (applicable on right triangles only) says:

$a^{2}+b^{2}=c^{2}$

Where $a$ and $b$ are the two legs of the triangle and $c$ is the length of the hypotenuse [THE LONGEST SIDE].

<u>We can square each leg on the triangle and take the sum, if that is equal to the square of the longest side, we have a right triangle. Let's check for all of these.</u>

$8^{2}+12^{2}\\=64+144\\=208$

$15^2=225$

They're not right triangle.

$10^{2}+24^{2}\\=100+576\\=676$

$26^2=676$

This is a right triangle.

$12^{2}+20^{2}\\=144+400\\=544$

$25^2=625$

They're not right triangle.

$15^{2}+18^{2}\\=225+324\\=549$

$20^2=400$

They're not right triangle.

Only B is the right triangle.

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3 years ago

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How do yo spell 607.409 in word form

vitfil [10]

Sixtyseventhousand four hundred nine

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3 years ago

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Which equations have the variable term isolated to one side of the = and the constant isolated to the other side free equation 1

Monica [59]

Answer:

2 and 3

Step-by-step explanation:

I really don't have one but I did get it right

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3 years ago

15. The equation below defines z as a differentiable function of x and y. Find the value of dz/dy at the point (1, 1, 1).

MariettaO [177]

Isolate the term with $z^2$ .

$x^2 - 5y^2 + xyz^2 = y - 4 \implies xyz^2 = -x^2 + 5y^2 + y - 4$

Differentiate both sides with respect to $y$ .

$\dfrac{\partial(xyz^2)}{\partial y} = \dfrac{\partial(-x^2 + 5y^2 + y - 4)}{\partial y}$

By the product and chain rules,

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Solve for the partial derivative, then evaluate at $(x,y,z) = (1,1,1)$ .

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2 years ago