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2 years ago

Write the equation. Lucy rides her bike 20 km every week how many km dose Lucy ride her bike in 7 weeks?

Mathematics

1 answer:

Snezhnost [94]2 years ago

5 0

Let K = km in 7 weeks

Equation:

K = 7(20)

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Major arc JL measures 300°. Which describes triangle JLM?

Fed [463]

Answer: equilateral

Step-by-step explanation:

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2 years ago

Hello please help me as this is the last question on my test and then I’m done so it would be great if u can tell me if the answ

elena55 [62]

Answer:

<em>B) Parallellogram </em>

Step-by-step explanation:

Parallelograms are quadrilaterals where all of the opposite sides are parallel and equal.

Hope this helped, let me know if you need anything else ^-^

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2 years ago

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Please help me. I need help thank you.

STatiana [176]

Answer:

Step-by-step explanation:

the ratio is 1:2

so,

$4*2=8\\7*2=14\\1*2=2$

the only shape with those numbers is C

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2 years ago

30 POINTS! Consider the system of linear equations and the matrix equations below.

fiasKO [112]

Answer:

Option C is correct.

Step-by-step explanation:

-x+3y=2

4x-2y=22

In matrix form is represented as:

$\left[\begin{array}{cc}-1&3\\4&-2\end{array}\right] \left[\begin{array}{c}x&y\end{array}\right] =\left[\begin{array}{c}2&22\end{array}\right]$

AX=B

$X = A^{-1}B$

$A^{-1} = |A|/Adj A$

|A| = (-1)(-2)-(3)(4)

|A| = 2-12

|A| = -10

Adj A = $\left[\begin{array}{cc}-2&-3\\-4&-1\end{array}\right]$

A^-1 = -1/10 $\left[\begin{array}{cc}-2&-3\\-4&-1\end{array}\right]$

A^-1 = 1/10 $\left[\begin{array}{cc}2&3\\4&1\end{array}\right]$

X= A^-1 B

X = 1/10 $\left[\begin{array}{cc}2&3\\4&1\end{array}\right]$ $\left[\begin{array}{c}2&22\end{array}\right]$

X=1/10 $X=1/10\left[\begin{array}{c}2*2+3*22\\4*2+1*22\end{array}\right]\\X=1/10\left[\begin{array}{c}4+66\\8+22\end{array}\right]\\X=1/10\left[\begin{array}{c}70\\30\end{array}\right]\\X=\left[\begin{array}{c}70/10\\30/10\end{array}\right]\\X=\left[\begin{array}{c}7\\3\end{array}\right]$

So, x = 7 and y =3

Hence Option C is correct.

4 0

3 years ago

Read 2 more answers

PLSSSSS HELPPP I WILLL GIVEEE BRAINLIEST!!!!!!!!

never [62]

C = b - a

explanation:
you just need to subtract a in this equation.

5 0

2 years ago