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bearhunter [10]
4 years ago
14

X + (-9) + 9 = 8 solve the equation using mental math

Mathematics
1 answer:
Studentka2010 [4]4 years ago
8 0

Answer:

X=8 simplify equation

Step-by-step explanation:

-9+9=0

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Multiply. Answer with a mixed number in simplest form.<br><br> 5 x 2 1/4
soldier1979 [14.2K]

Answer:

The correct answer should be 11\frac{1\\}{4}

Step-by-step explanation:

Let me know if this is wrong and I will correct it if it is.

3 0
3 years ago
Write the whole number that correctly completes the word problem:
irina1246 [14]

Answer:

2/3(two thirds) of the 24 hour day awake, amounts to 24 x 2 / 3 hours awake which is equal to 16 hours awake

Step-by-step explanation:

24 x 2/3

there are many ways to evaluate this mentally, if you know 8x3=24, for instance you can multiply top and bottom of 2/3 by 8 yo gey 24 x 16/24 which is 16 hours

4 0
3 years ago
Patricia baked some cupcakes for sale. she put half of the cupcakes equally into 6 big boxes and the other half equally into sma
mojhsa [17]

Answer:

The answer is given below

Step-by-step explanation:

a)

Let us assume Patricia baked x number of cakes. She put half of the cupcakes (i.e x/2) equally into 6 big boxes.

6 big boxes contained \frac{x}{2} cakes, therefore 1 big box would contain \frac{x}{2}/6=\frac{x}{12} cakes.

Let us assume she put the other half into 14 small boxes, therefore each small box would contain \frac{x}{2}/14=\frac{x}{28} cakes.

There were 45 cupcakes in 3 big boxes and 8 small boxes altogether. That is:3(\frac{x}{12} )+8(\frac{x}{28})=45\\ 84x+96x=15120\\180x=15120\\x=84

Therefore Patricia baked 84 cup cakes

b)

She sold all the small boxes and collected $189, i.e she sold 14 small box for $189. Each small box = $189/14 = $13.5

6 0
4 years ago
How many solutions does the nonlinear system of equations graphed below<br> have?
FrozenT [24]

Answer:

A) Zero

Step-by-step explanation:

A good way to tell how many solutions there are in a system of equations, is to look at how many times the equations intersect. In this case, the equations don't intersect so there are no solutions.

If this answer is correct, please make me Brainliest!

4 0
4 years ago
Solve.<br><br> x^2 - 49 = 0<br> A) ±49 <br> B) ±12 <br> C) ±7 <br> D) ±6
zlopas [31]
The answer is c
x^2 = 49
x = √49
√49 = ±7
3 0
3 years ago
Read 2 more answers
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