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4 years ago

Please help me answer all of them

Mathematics

2 answers:

Setler79 [48]4 years ago

5 0

Answer:

1. 3:4

2. 1 : 3

3. 3 : 1

4. 1 : 5

5. 2: 5

Step-by-step explanation:

Marizza181 [45]4 years ago

4 0

Answer:

1. 3:4 (because 9÷3 is 3 and 12÷3 is 4)

2. 1:3 (because 2÷2 is 1 and 6÷2 is 3)

3. 3:1 (because 21÷7 is 3 and 7÷7 is 1)

4. 1:5 (because 3÷3 is 1 and 15÷3 is 5)

5. 2:5 (because 4÷2 is 2 and 10÷2 is 5)

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For f(x) = 4x +1 and g(x) = x2 - 5, find (g/f) (x).

Softa [21]

Answer:

$\left(g/f\right)\left(x\right)=\frac{x}{4}-\frac{1}{16}-\frac{79}{16\left(4x+1\right)}$

Step-by-step explanation:

$f(x)=4x+1$

$g\left(x\right)=x^2\:-\:5$

(g/f)(x) = g(x) / f(x)

$=\:\frac{x^2\:-\:5}{4x+1}\:\:\:\:\:\:$

$=\frac{x}{4}+\frac{-\frac{x}{4}-5}{4x+1}$

$=\frac{x}{4}-\frac{1}{16}+\frac{-\frac{79}{16}}{4x+1}$

$=\frac{x}{4}-\frac{1}{16}-\frac{79}{16\left(4x+1\right)}$

Therefore,

$\left(g/f\right)\left(x\right)=\frac{x}{4}-\frac{1}{16}-\frac{79}{16\left(4x+1\right)}$

8 0

3 years ago

Write in scientific notation .0000345

matrenka [14]

Answer:

I know how to do it I'ma explain it step by step.

Step-by-step explanation:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the 10 . If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

4 0

3 years ago

A strawberry farm had 7,200 plants in total, one field had 18 rows of 200 plants ; the other field had 9. Rows of

Svetradugi [14.3K]

Answer:

We have a total of 7200 plants.

The plants are distributed in one field with 18 rows of 200 plants and another field with 9 rows of N plants.

Where we want to find the value of N.

The total number of plants in the rows is:

"number of rows times number of plants in each row."

Then the total number of plants is:

18*200 + 9*N

And we know that we have a total of 7200 plants, then:

18*200 + 9*N = 7200

9*N = 7200 - 18*200 = 3600

N = 3600/9 = 400

Then the plants are distributed in 18 rows of 200 plants for one field, and 9 rows of 400 plants in the other field.

8 0

3 years ago

Help solve this please

ad-work [718]

Answer:

a) 2

b) - $\frac{1}{2}$

c) y = 2x + 1

Step-by-step explanation:

First put the equation into slope intersept form (y=mx+b) by...

Move the variable to the right-hand side and change its sign : -y = -4 -2x

Change the signs on both sides of the equation: y = 4 + 2x

Use the commutative property to reorder the terms : y = 2x + 4

Slope intersept form : y = 2x + 4

Parallel lines have the same slope so.... a parallel slope is 2

First put the equation into slope intersept form (y=mx+b) by...

Move the variable to the right-hand side and change its sign : -y = -4 -2x

Change the signs on both sides of the equation: y = 4 + 2x

Use the commutative property to reorder the terms : y = 2x + 4

Slope intersept form : y = 2x + 4

To find a perpendicular slope flip the slope and change the sign : - $\frac{1}{2}$

First put the equation into slope intersept form (y=mx+b) by...

Move the variable to the right-hand side and change its sign : -y = -4 -2x

Change the signs on both sides of the equation: y = 4 + 2x

Use the commutative property to reorder the terms : y = 2x + 4

Slope intersept form : y = 2x + 4, parellel slope : 2

Substitute the x and y values with the given ordered pair: 3 = 2(1) + b
Calculate the product: 3 = 2 + b
Move the variable to the left-hand side and change its sign: -x = 2 - 3

Calculate the difference and change the signs : b = 1

Use the slope and y-intersept (b) to write the new line : y = 2x + 4

7 0

3 years ago

Find the slope between the following points, show all work.<br> (-8, 19) and (-3, 13)

Ymorist [56]

Slope formula:

m = (y2-y1)/(x2-x1)
m = (13-19)/(-3-(-8))
m = (13-19)/(-3+8)
m = -6/5

The slope is therefore -6/5

4 0

3 years ago