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Nataliya [291]
3 years ago
8

Please help with at least 1 question. I’m really stressed

Mathematics
2 answers:
Art [367]3 years ago
4 0
Please help with at least one question I’m really stressed
mars1129 [50]3 years ago
3 0
40 is B. Can you post the rectangle to the right?
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If x+y = -1, and xy= -12, what is the value of (x+3) (y+3) ?
9966 [12]

Answer:

Here are my hints. You can solve it yourself

1/ xy = -12      -->      x = -12/y

2/ (-12/y) + y = -1      -->     -(12/y) + (y²/y) = -1    -->    -12 + y² = -y   -->    y²+y-12=0

3/ From y²+y-12=0 we can find y then use y to find x and then do your

(x+3) * (y+3)

7 0
3 years ago
Which calculation could not be used to find the percentage change
bogdanovich [222]

Answer:

Option (B).

Step-by-step explanation:

Percentage change between two numbers a and b can be calculated by the formula,

% change = \frac{|b-a|}{a}\times 100

Where, (b - a) = Change in values

a = Initial value

If a = 16 and b = 20

Percentage change between 16 and 20 will be,

= (\frac{20-16}{16})\times 100

= \frac{4}{16}\times 100

= 25%

If a = 20 and b = 16,

Percentage change = \frac{|16-20|}{20}\times 100

                                 = 20%

Therefore, %change between 16 and 24 may be 16% or 20%.

Option (A),

\frac{20-16}{16}\times 100 = 25%

Option (B),

\frac{20}{16}-1\times 100 = 1.25 - 1 × 100

                   = 1.25 - 100

                   = -98.75%

Option (C),

100\times \frac{1}{4} = 25%

Option (D),

\frac{(20-16)}{20}\times 100 = 20%

Therefore, we can not use the calculation used in Option (B).

6 0
3 years ago
(-57)-(+12) <br>find the difference​
Airida [17]

Answer:

siiiii

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Write the following equation in slope intercept form. 12x + 4y = -4
Vlada [557]

Answer:

y=-3x-1

Step-by-step explanation:

12x+4y=-4

Slope intercept y=mx+b

Subtract 12x from both sides

4y=-4-12x

Divide each side by 4

y=-1-3x then just reorder to match slope intercept form

y=3x-1

6 0
2 years ago
What's the answer to this problem
topjm [15]

Answer: 5' 10"


Explanation: Borrow a foot from 8 to make it 7 feet and 16 inches. Subtract 6 from 16 to get 10 inches. Subtract 2 from 7 to get 5 feet. So the answer is 5' 10".


6 0
3 years ago
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