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3 years ago

Solve for x Substitute in What kind of angle!!

Mathematics

2 answers:

scoundrel [369]3 years ago

7 0

A straight line is 180°. 180°-135°=55°, so x=55°, which is an acute angle because it is less than 90°.

Nikolay [14]3 years ago

7 0

X is actually 45.. still an acute angle

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It took Everly 55 minutes to run a 10-kilometer race last weekend if you know that 1 kilometer equals 0.621 mile how many minute

ikadub [295]

55 min/10 km=5.5 min/km

5.5 min/km x 1 km/.621 mile= 5.5/.621=8.86 min/mile

The answer is D.

3 0

3 years ago

N is a rational number.m is an irrational number.n2 cannot be an irrational number? why or why not

Korolek [52]

If n is rational, it means that

$n\in\mathbb{Q}\Rightarrow n=\frac{p}{q},\quad p\in\mathbb{Z},\quad q\in\mathbb{Z}^*$

Therefore when we do n² we can write it as

$n^2=\frac{p^2}{q^2},\quad p\in\mathbb{Z},\quad q\in\mathbb{Z}^*$

Remember that the product of two integer numbers is also an integer, therefore we can guarantee that

$p^2\in\mathbb{Z}\text{ and }q^2\in\mathbb{Z}^*$

Then we can confirm that n² is the quotient of two integers and the denominator is not zero, therefore, n² is always rational, it cannot be an irrational number

8 0

1 year ago

T F IfA and B are similar matrices, then AT=BT

muminat

Answer:

Step-by-step explanation:

We know that for two similar matrices $A$ and $B$ exists an invertible matrix $P$ for which

$[tex]B = P^{-1} AP$ [/tex]

∴ $B^{T} = (P^{-1})^{T} A^{T} P^{T} \\$

Also $P^{-1}P = I\\$

and $(P^{-1})^{T} = (P^{T})^{-1}$

∴ $(P^{-1})^{T}P^{T} = I$

so, $B^{T} = (P^{-1})^{T} A^{T} P^{T} = (P^{T})^{-1}A^{T} P^{T}\\B^{T} = A^{T} I\\B^{T} = A^{T}$

7 0

3 years ago

Ramón and Merissa are driving to New York City after college. The first 300 miles they spend $12.50 on gas.

Ganezh [65]

Answer:

Step-by-step explanation:

$77

4 0

3 years ago

The circumference of a circle is 138.16 centimeters. What is the area of the circle?

vodomira [7]

Circumference formula tells you $C=2 \pi r$

 $C=2 \pi r$
 $138.16=2 \pi r$
 $21.99= r$
 $r=21.99cm$ 
The formula to find the area of a circle is $A= \pi r^2$

 $A= \pi r^2$
 $A= \pi (21.99)^2$
 $A= \pi (483.56)$
 $A= 1519cm^2$

6 0

3 years ago