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2 years ago

In a school there are 1000 boys and 800 girls. Calculate the percentage of boys and girls

Mathematics

1 answer:

Arisa [49]2 years ago

8 0

Answer:

55.55%= boys & 44.44% = girl

Step-by-step explanation:

1000/(1000+800)=1000/1800=.5555 or 55.55% are boys

800/(1000+800)=800/1800=.4444 or 44.44% are girls.

Therefore, 55,55% are boys and 44.44% are girls.

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Jane drinks 275 milliliters of juice from a 1 liter container. How much juice is left

Lubov Fominskaja [6]

Well, there's 1000 milliliters in one liter.
Do 1000 - 275.
You should get 775.

The answer is 775 milliliters of juice. <span />

8 0

3 years ago

Assume that T is a linear transformation. Find the standard matrix of T. T: R^3 right arrow R^2 , T(e 1) =(1,2), and T(e2 ) =( -

irina [24]

Answer:

$A = \left[\begin{array}{ccc}1&-4&2\\2&6&-6\end{array}\right]$

Step-by-step explanation:

Given

$T:R^3->R^2$

$T(e_1) = (1,2)$

$T(e_2) = (-4,6)$

$T(e_3) = (2,-6)$

Required

Find the standard matrix

The standard matrix (A) is given by

$Ax = T(x)$

Where

$T(x) = [T(e_1)\ T(e_2)\ T(e_3)]\left[\begin{array}{c}x_1&x_2&x_3\\-&&x_n\end{array}\right]$

$Ax = T(x)$ becomes

$Ax = [T(e_1)\ T(e_2)\ T(e_3)]\left[\begin{array}{c}x_1&x_2&x_3\\-&&x_n\end{array}\right]$

The x on both sides cancel out; and, we're left with:

$A = [T(e_1)\ T(e_2)\ T(e_3)]$

Recall that:

$T(e_1) = (1,2)$

$T(e_2) = (-4,6)$

$T(e_3) = (2,-6)$

In matrix:

$(a,b)$ is represented as: $\left[\begin{array}{c}a\\b\end{array}\right]$

So:

$T(e_1) = (1,2) = \left[\begin{array}{c}1\\2\end{array}\right]$

$T(e_2) = (-4,6)=\left[\begin{array}{c}-4\\6\end{array}\right]$

$T(e_3) = (2,-6)=\left[\begin{array}{c}2\\-6\end{array}\right]$

Substitute the above expressions in $A = [T(e_1)\ T(e_2)\ T(e_3)]$

$A = \left[\begin{array}{ccc}1&-4&2\\2&6&-6\end{array}\right]$

Hence, the standard of the matrix A is:

$A = \left[\begin{array}{ccc}1&-4&2\\2&6&-6\end{array}\right]$

6 0

3 years ago

What is the first step to solve the equation 16x-21 = 52?

Makovka662 [10]

Answer:

2) Add 21 to both sides

Step-by-step explanation:

When solving $16x-21=52$ for $x$ , our goal to isolate $x$ such that we have $x$ set equal to something.

Therefore, we want to start by adding 21 to both sides. This leaves us with $16x=73$ and we are one step closer to isolating $x$ .

8 0

3 years ago

Read 2 more answers

Write the addition or subtraction shown by the number line

Zigmanuir [339]

-3+7=4 should be your answer

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3 years ago

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Angle 1 and Angle 2 form a linear pair. If m41 = (5x + 9)® and m22 = (3x + 11)", find the measure of

MissTica

Answer:

2/23/140+50ismmm/50

148/'320"120+4640=%40=40

7 0

3 years ago