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Alekssandra [29.7K]
4 years ago
7

The Oates family went out for dinner the price of the meal was $33.95 the sales tax was 7.25% of the price of the meal . The tip

was 15% of the meal and the sales tax . How much money did the Oates family pay for the meal, including tax and tip
Mathematics
1 answer:
crimeas [40]4 years ago
8 0

Well you have to go $33.95 x 7.25 and that will be your answer. Do it fast!

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Solve 2x + 5y = −13 3x − 4y = −8
zlopas [31]
If you would like to solve 2x + 5y = -13 and 3x - 4y = -8, you can do this using the following steps:

2x + 5y = -13       /*4
3x - 4y = -8         /*5
_______________
8x + 20y = -52
15x - 20y = -40
_______________
8x + 15x + 20y - 20y = -52 - 40
23x = -92
x = -92 / 23
x = -4

<span>3x - 4y = -8 
</span>3 * (-4) - 4y = -8
-12 - 4y = -8
12 + 4y = 8
4y = 8 -12
4y = -4
y = -1

The correct result would be x = -4 and y = -1.
6 0
3 years ago
Can you help me with this question please!​
Crazy boy [7]

Answer:

so the first one i think is 1 and the second one is 4

Step-by-step explanation:

6 0
3 years ago
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Order the group of parabolas from widest to narrowest  y = 1/4x2, y = -1/2x2, y = 3/2x2
Marina86 [1]

widest to narrowest: y=3/2x2, y= -1/2x2, y= 1/4x2

7 0
4 years ago
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Một lô hàng chứa rất nhiều sản phẩm, trong đó tỷ lệ sản phẩm loại tốt là 70%. chọn ngẫu nhiên từ lô hàng ra 5 sản phẩm. gọi X là
den301095 [7]

trả lời : lâp bảng

X=0 thì xác suất lấy ra được sản phẩm tốt là 5*30%=1,5%

X =1 thì xác suất lấy ra được là 1* 70%*4*30%=0,84%

X=2 thì xác suất lấy ra được sản phẩm tốt là 2*70%*3*30%=1,26%

X=3 thì xác suất lấy ra được sản phẩm tốt là 3*70%*2*30%=1,26%

X=4 thì xác suất lấy ra được sản phẩm tốt là 4*70%*1*30%=0,84%

X=5 thì xác suất lấy ra được sản phẩm tốt là 5*70%=3,5%

X 0 1 2 3 4 5

P 1,5 0,84 1,26 1,26 0,84 3,5

b,

E(x)= 1,5*0+ 0,84*1+1,26*2+1,26*3+0,84*4+3,5*5=28

E(x^2)=1,5*0^2+0,84*1^2+1,26*2^2+1,26*3^2+0,84*4^2+3,5*5^2=118,16

===> V(x)= (E(x))^2-E(x^2)=28^2-118,16=665,84

8 0
3 years ago
What is the value of the following expression? <br> -9/4➕-8/5-2 1/2
SOVA2 [1]
The answer to the expression is -97/20 or -4.85
3 0
3 years ago
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