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3 years ago

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What is the equation for proportions? What does each letter represent?

1 answer:

marysya [2.9K]3 years ago

3 0

Answer:

Ratios and Proportions - Proportions - In Depth. A proportion is simply a statement that two ratios are equal. It can be written in two ways: as two equal fractions a/b = c/d; or using a colon, a:b = c:d. The following proportion is read as "twenty is to twenty-five as four is to five."

Step-by-step explanation:

look at the attachment.

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Please help. i dont understand what i have to do and how to get it. thank you

rjkz [21]

Answer:

$\left[\begin{array}{ccc}9\\10\\\end{array}\right]$

Step-by-step explanation:

Evaluate 3a by multiplying each element by 3

3a = 3 $\left[\begin{array}{ccc}2\\4\\\end{array}\right]$ = $\left[\begin{array}{ccc}3(2)\\3(4)\\\end{array}\right]$ = $\left[\begin{array}{ccc}6\\12&\\\end{array}\right]$ , then

3a + b

= $\left[\begin{array}{ccc}6\\12\\\end{array}\right]$ + $\left[\begin{array}{ccc}3\\-2\\\end{array}\right]$ ← sum corresponding elements

= $\left[\begin{array}{ccc}6+3\\12-2\\\end{array}\right]$

= $\left[\begin{array}{ccc}9\\10\\\end{array}\right]$

8 0

3 years ago

Find 270% of 25 use th proportion strategy (nearest tenth)

icang [17]

Answer:

67.5

Step-by-step explanation:

or 60 tens, 7 ones, 5 tenths

3 0

3 years ago

Read 2 more answers

Why do perpendicular lines intersect at a right angle

vagabundo [1.1K]

All perpendicular lines must cross to form a right angle, meaning they intersect at a right angle.

Hope this helps!

3 0

3 years ago

Ivan

we are given two system of equations

First equation is

$y=2x-1$

we can write as

$-2x+y=-1$

Second equation is

$6x-y=13$

now, we can find augmented matrix

$A=\begin{pmatrix}-2&1&-1\\ 6&-1&13\end{pmatrix}$

now, we can change it into reduced row echelon form

step-1: multiply the 1st row by -1/2

$A=\begin{pmatrix}-1&-1/2&1/2\\ 6&-1&13\end{pmatrix}$

step-2: add -6 times the 1st row to the 2nd row

$A=\begin{pmatrix}-1&-1/2&1/2\\ 0&2&10\end{pmatrix}$

step-3:multiply the 2nd row by 1/2

$A=\begin{pmatrix}-1&-1/2&1/2\\ 0&1&5\end{pmatrix}$

step-4:add 1/2 times the 2nd row to the 1st row

$A=\begin{pmatrix}1&0&3\\ 0&1&5\end{pmatrix}$

so, we will get

$x=3,y=5$

Answer is (3,5)

6 0

3 years ago

Read 2 more answers

Sam can make 16 breadsticks

mojhsa [17]

Answer:

4x15=60 minutes = 1 hr

Therefore 16x15=240 breadsticks

7 0

3 years ago

Read 2 more answers