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3 years ago

Find two numbers, if their sum is 3 and their difference is 21

Mathematics

1 answer:

boyakko [2]3 years ago

4 0

Answer:

The two numbers are -9 and 12

Step-by-step explanation:

-9+12=3 12--9=12+9=21

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Julie is tracking the growth of a plant for a science project. The height of the plant on the 2nd day she measured was 8 inches

kvv77 [185]

Answer:

Step-by-step explanation:

The relationship is linear, so the plant grows the same amount each day.

The height on the 2nd day was 8 inches:

h₂ = 8

The height on the 7th day was 20.5 inches:

h₇ = h₂ + (7-2)d = 8 + 5d = 20.5

d = 2.5

The plant grows 2.5 inches each day.

6 0

3 years ago

144=12x 45 =4x-27 2x-2=14 12x=44-10x does any one kno these questions?

Free_Kalibri [48]

Hello russell6333!

$\huge \boxed{\mathfrak{Question} \downarrow}$

Solve for x.

144 = 12x
45 = 4x - 27
2x - 2 = 14
12x = 44 - 10x

$\large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}$

$1) \: \: \: 144 = 12x \\ \frac{144}{12} = x \\ \boxed{ \boxed{ \bf12 = x}}$

__________________

$2) \: \: \: 45 = 4x - 27 \\ 45 + 27 = 4x \\ 72 = 4x \\ \frac{72}{4} = x \\ \boxed{ \boxed { \bf18 = x }}$

__________________

$3) \: \: \: 2x - 2 = 14 \\ 2x = 14 - 2 \\ 2x = 12 \\ x = \frac{12}{2} \\ \boxed{ \boxed{ \bf \: x = 6}}$

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$4) \: \: \: 12x = 44 - 10x \\ 12x + 10x = 44 \\ 22x = 44 \\ x = \frac{44}{22} \\ \boxed{\boxed{ \bf \: x = 2}}$

__________________

To solve questions of these sorts, bring all the terms to one side & simplify it leaving x alone in the other side of the equation (other side of the equal to sign). After simplification you'll get the value of x.
Remember that the signs & operations will change when you bring a term to the other side of the equation.
So, addition will become subtraction, subtraction will become addition, multiplication will become division & division will become multiplication.

__________________

Hope it'll help you!

ℓu¢αzz ッ

8 0

3 years ago

Read 2 more answers

a bakery uses 475 pounds of apples to make a thousand apple tarts each tart contains the same amount of apples how many pounds o

nignag [31]

The answer is 0.475 of apples are used in each tart

6 0

3 years ago

Read 2 more answers

The price of a new car was £11 800

Angelina_Jolie [31]

Answer:

12 % reduction

Step-by-step explanation:

11800 - 10384 = 1416

1416 / 11800 = 0.12

0.12 × 100 = 12

3 0

2 years ago

Read 2 more answers

Solve the system of equations algebraically. 3x+8y=−6 x−y=9 (x,y)= (

vova2212 [387]

Step-by-step explanation:

x=y+9

substitute

3(y+9)+8y=-6

3y+27+8y= -6

13y = -6 -27

13y= -33

y = -33/13

x = -33/13 + 9

4 0

2 years ago