4 years ago

Select True or False for each statement.

Mathematics

2 answers:

Aliun [14]4 years ago

6 0

The first in trey and the last is false

gtnhenbr [62]4 years ago

4 0

Answer:

the first one is true and the second one is false.

Step-by-step explanation:

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What is a possible solution set to x + 7 ≤ -9 ?

masha68 [24]

Answer:

Step-by-step explanation:

x + 7 ≤ -9 subtract 7 from both sides

x≤-16 this is your answer

If you're plotting it will be (-∞,-16]

8 0

3 years ago

Read 2 more answers

Which shows how to find the value of this expression when x=-2 and y=5? <br> (3x^3y^-2)2

Gnoma [55]

Put x = -2 and y = 5 to the expression.

$(3x^3y^{-2})^2$

$\left[3\cdot(-2)^3(5)^{-2}\right]^2=\left[3(-8)\cdot\dfrac{1}{5^2}\right]^2=\left(-24\cdot\dfrac{1}{25}\right)^2=\left(-\dfrac{24}{25}\right)^2\\\\=\dfrac{24^2}{25^2}=\dfrac{576}{625}$

explanation

$(-2)^3=(-2)(-2)(-2)=-8\\\\a^{-n}=\dfrac{1}{a^n}\to5^{-2}=\dfrac{1}{5^2}=\dfrac{1}{(5)(5)}=\dfrac{1}{25}\\\\a^2\geq0\ \text{for any real number}\to\left(-\dfrac{24}{25}\right)^2=\left(\dfrac{24}{25}\right)^2\\\\\left(\dfrac{a}{b}\right)^2=\dfrac{a^2}{b^2}\to\left(\dfrac{24}{25}\right)^2=\dfrac{24^2}{25^2}=\dfrac{(24)(24)}{(25)(25)}=\dfrac{576}{625}$