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4 years ago

I need help please and thank you

Mathematics

1 answer:

spin [16.1K]4 years ago

4 0

Answer:

11 4/5

Step-by-step explanation:

multiply 2 1/2 by 2 then add 3 2/5 multiplied by two together to get the answer

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What is 14.36 times 4.9 equals what??

NNADVOKAT [17]

70.36 I believe. :D Hope I helped.

5 0

3 years ago

Read 2 more answers

Find the vertex form of the following quadratic function. f(x)= x^2-11x+9

Shalnov [3]

f(x) = (x - $\frac{11}{2}$ )² - $\frac{85}{4}$

the equation of a quadratic in vertex form is

y = a(x - h)² + k

where (h, k) are the coordinates of the vertex and a is a multiplier

given a quadratic in standard form : y = ax² + bx + c ( a ≠ 0 )

then the x- coordinate of the vertex is

$x_{vertex}$ = - $\frac{b}{2a}$

f(x) = x² - 11x + 9 is in standard form

with a = 1, b = - 11 and c = 9

$x_{vertex}$ = - $\frac{-11}{2}$ = $\frac{11}{2}$

substitute this value into the equation for y- coordinate

y = ( $\frac{11}{2}$ )² - 11( $\frac{11}{2}$ ) + 9

= $\frac{121}{4}$ - $\frac{242}{4}$ + $\frac{36}{4}$ = - $\frac{85}{4}$

f(x) = (x - $\frac{11}{2}$ )² - $\frac{85}{4}$ ← in vertex form

3 0

3 years ago

<img src="https://tex.z-dn.net/?f=%20%7Bx%7D%5E%7B2%7D%20%20%2B%2081" id="TexFormula1" title=" {x}^{2} + 81" alt=" {x}^{2} + 8

borishaifa [10]

X to the power of two+81

5 0

3 years ago

4)_Slope = 4; contains (-5, - 13)<br> I need help please

castortr0y [4]

Answer:

The equation of the line with slope = 4 and point (-5, -13)

will be:

$y=4x+7$

Step-by-step explanation:

Given

slope = m = 4

point = (-5, -13)

As the point-slope form of the equation of line is

$y-y_1=m\left(x-x_1\right)$

where m is the slope.

substituting the values m = 4 and the point (-5, -13)

$y-y_1=m\left(x-x_1\right)$

$y-\left(-13\right)=4\left(x-\left(-5\right)\right)$

$y+13=4\left(x+5\right)$

subtract 13 from both sides

$y+13-13=4\left(x+5\right)-13$

$y=4x+7$

Therefore, the equation of the line with slope = 4 and point (-5, -13)

will be:

$y=4x+7$

7 0

3 years ago

The area of a rectangular field is 48m2 and one of its sides is 6m . How long will a lady take to cross the field diagonally at

tatiyna

Answer:

It will take her approximately 28 seconds to cross the diagonal of the pitch

Step-by-step explanation:

If we can find the length of the diameter of the field (in Metres), we can easily find the time it takes her to cross this length using motion equations.

Step one: Find the length of the field from its area.

The field is rectangular in shape. The area of the field is 48m^2. To get the area of the field, we had to multiply its length and its breadth.

i.e area = length X breadth.

Let us assume that the breadth = 6m

its length will be area / breadth = 42/ 6 = 7m

The length of the pitch = 7 m

Step Two: Find the length of the diagonal using Pythagoras' theorem.

From Pythagoras'theorem, the length of the diagonal can be obtained by

$diagonal = \sqrt{l^2 +b^2}$

$diagonal = \sqrt{6^2+ 7^2} = 9.22m$

The length of the diagonal is 9.22m

Step three: Find the time using her speed and the distance she needs to cover.

Time = distance / speed

time = 9.22 /20 = 0.46 minutes

It will take her approximately 28 seconds to cross the diagonal of the pitch

6 0

3 years ago