Tema
Q:
1) \( \left(7 x^{4}-10 x^{5}\right)^{2} \)
Q:
Calcola la lunghezza di una circoner
tro 8 cm , approssimando \( \pi \) ai centesimi.
Q:
\( 1.1(x-1)^{2}=\sqrt{16} \)
\( 1.2 x^{2}-5 x=14 \) (correct to two decimal places)
\( 1.3 \quad x-2=\sqrt{8-x} \)
\( 1.4 \quad x^{2}+5 x<-6 \)
\( 1.5 \quad(\sqrt{81})^{x+1}=81^{2 x} \)
\( 1.6 \quad \) If \( \frac{3}{2} \) is one root of the equation \( b x^{2}-x=3 \), determine \( b \) and the other root.
Q:
for \( x \) in each:
\( \begin{array}{l}(x-1)^{2}=\sqrt{16} \\ 3 x^{2}-5 x=14 \text { (correct to two decimal } \\ x-2=\sqrt{8-x} \\ x^{2}+5 x<-6 \\ (\sqrt{81})^{x+1}=81^{2 x} \\ \text { If } \frac{3}{2} \text { is one root of the equation } b x^{2}-x=\end{array} \).
Q:
A variable \( x \) is normally distributed with mean 22 and standard deviation 3.
Round your answers to the nearest hundredth as needed.
a) Determine the \( z \)-score for \( x=27 \).
b) Determine the \( z \)-score for \( x=20 \).
c) What value of \( x \) has a \( z \)-score of 2.33 ?
d) What value of \( x \) has a \( z \)-score of -0.3 ?
\( x= \)
e) What value of \( x \) has a \( z \)-score of 0 ?
Q:
5 State which consecutive whole numbers are either side of:
\( \begin{array}{llll}\text { a } \sqrt{29} & \text { b } \sqrt{40} \\ \text { e } \sqrt{85} & \text { f } \sqrt{103} & \text { o } & \sqrt{71}\end{array} \)
Q:
e) N.A.
9) La suma de los tres términos de una resta es 6858 y el sustraendo es la tercera parte
del minuendo. Hallar la diferencia:
Q:
Factorize the following fully
\( \begin{array}{l}\text { 1.3.1 } 2 y^{2}+6 y-3 x y-9 x \\ \text { 1.3.2. } x^{6}-64\end{array} \)
Q:
A variable \( x \) is normally distributed with mean 21 and standard deviation 8 .
Round your answers to the nearest hundredth as needed.
a) Determine the \( z \)-score for \( x=27 \).
\[ z=0.75 \]
b) Determine the \( z \)-score for \( x=16 \).
\[ z= \]
Q:
does \( x^{2}+2 y^{2}+4 y-2 x y+4=0 \) is a function?
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