3 years ago

From the observation deck of a skyscraper, Isabella measures a 67° angle of

Mathematics

1 answer:

loris [4]3 years ago

7 0

Answer: 383.3

Step-by-step explanation:

Opposite over adjacent

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Use the Distributive Property to write each expression as an equivalent algebraic expression. (7 + a)3 Question 4 options: 3(7a)

AysviL [449]

Answer:

(B)21+3a

Step-by-step explanation:

An expression is said to be distributive when:

$(a+b)c=a \cdot c+b \cdot c$

Given the algebraic expression: (7 + a)3

Applying the distributive property

$(7 + a)3 = 7 \cdot 3+a \cdot 3\\=21+3a$

An equivalent expression is 21+3a.

The correct option is B

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4 years ago

Use Descartes rule to determine the possible number of positive and negative solutions for the polynomial: f(x)=10x^4-21x^2+11

galina1969 [7]

Answer:

x = 11/2

Step-by-step explanation:

just go by each step

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2 years ago

Find the length of the leg a of a right triangle with leg length b = 21.5 inches and the hypotenuse c = 31.9 inches. Use a calcu

mylen [45]

The length of the leg a of the right triangle is obtained by applying the Pythagorean theorem which is given as:

$\text{opposite}^2+adjacent^2=hypothenus^2$

Thus, we have that:

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

Given that b = 21.5 inches and c = 31.9 inches, we now have:

$a^2+(21.5)^2=(31.9^2)$ $a^2+462.25=1017.61$ $a^2=1017.61-462.25$ $a^2=555.36$ $\begin{gathered} a=\sqrt[]{555.36}=23.57 \\ \Rightarrow a=23.6\text{ inches (to one decimal place)} \end{gathered}$

Therefore, the length of the leg a of the right triangle is 23.6 inches

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The measure of angle ABC is<br> A<br> D<br> 60<br> 40°

Umnica [9.8K]

The measure of angle ABC is 100 because all you do is add the 60 to the 40 and get 100.

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3 years ago