3 years ago

What operation am I gonna use for both of t hem I'm not sure??

Mathematics

1 answer:

gogolik [260]3 years ago

6 0

Division I'm pretty sure Try that

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If s(x) = 2 – x2 and t(x) = 3x, which value is equivalent to (s t)(-7)? A. -439 B. -141 C. 153 D. 443 please answer quick this t

nika2105 [10]

We're trying to find $s(t(-7))$ .

$t(-7)=3(-7)$

$t(-7)=-21$

$s(-21)=2-(-21)^2$

$s(-21)=2-441$

$s(-21)=-439$

Hope this helps.

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3 years ago

Show that the equation x cubed + 8x = 30 has a solution between x = 2.2 and x =2.3 ?

tatuchka [14]

$x^3+8x=30\\
x^3+8x-30=0\\\\
2.2^3+8\cdot2.2-30=10.648+17.6-30=-1.752\\
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$

For $x=2.2$ the value of $x^3+8x-30$ is negative, and for $x=2.3$ the value is positive which means between $x=2.2$ and $x=2.3$ there is an x for which the value of $x^3+8x-30$ is equal to 0 and therefore there is a solution.

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2 years ago

Given a sphere with radius r, the formula 4pier^2 gives

zhannawk [14.2K]

Answer:

B. The surface area.

Step-by-step explanation:

4πr^2 gives the surface area of a sphere.

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2 years ago

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Llamando x a un numero, expresa en lenguaje algebraico su doble