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Marat540 [252]
3 years ago
5

Help me i can’t do this

Mathematics
1 answer:
DerKrebs [107]3 years ago
7 0

Answer:

\huge\boxed{\sf Star = 14}

Step-by-step explanation:

Let snowman be x , star be y and shopping bag be z.

<u>So, the given equations are:</u>

1) x + y = 20                 (Eq. 1)

2) z = x + x      

 z = 2x                         (Eq. 2)

3) z + x = 18                   (Eq. 3)

Put Eq. (2) in Eq. (3)

2x + x = 18

3x = 18

Divide both sides by 3

x = 18 / 3

x = snowman = 6

Now, Put x in (Eq. 1)

6 + y = 20

Subtract 6 to both sides

y = 20 - 6

y = 14

So,

Star = 14

\rule[225]{225}{2}

Hope this helped!

<h3>~AH1807</h3>
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Find X such that f(x)=0 for f(x)= -2x^2-x
Leokris [45]

Answer:

x=\{-\frac{1}{2} ,\:0\}

Step-by-step explanation:

f(x) =-2x^2 -x\\plug \: f(x) =0\\0= -2x^2 -x\\2x^2 + x = 0\\x(2x+1) = 0\\\therefore x =0 \: or \: 2x+1 = 0\\\therefore x =0 \: or \: 2x = -1\\\\\therefore x =0 \: or \: x = -\frac{1}{2} \\\\x=\{-\frac{1}{2} ,\:0\}

6 0
3 years ago
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Step-by-step explanation:

total surface area of a cube = side × 6

25=side since all the sides of a cube are equal

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3 years ago
the glass gauge on a cylindrical coffee maker shows there are 45 cups left when the coffee maker is 36% full. How many cups of c
Nadya [2.5K]

Answer:

125 cups

Step-by-step explanation:

45 is 36% of what number?

45 = 0.36n

n = 45 / 0.36

n = 125

4 0
3 years ago
Hey guys! Okay so this question is kinda hard so if anyone could help that would be great ^-^
Marat540 [252]
There are 3 puppies that are male

2 puppies that are white females

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The probability that a puppy will be male, white or both is 2/7

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7 0
3 years ago
Rock climbing. I am out rock climbing, and the rock face has 4 easy, 7 challenging, and 3 extreme routes to get to the top. The
marishachu [46]

Answer:

0.7857

Step-by-step explanation:

Given the following :

Number of Easy faces = 4

Number of challenging faces = 7

Number of extreme faces = 3

Total number of faces or route = (4 + 7 + 3) = 14

If one route is chosen at random, the probability of not choosing an extreme route will be :

Probability = (required outcome / Total possible outcomes)

P(not choosing an extreme route) = 1 - P(choosing an extreme route)

P(choosing an extreme route) = 3 / 14 = 0. 2143

Hence,

P(not choosing an extreme route) = 1 - 0.2143

= 0.7857

4 0
4 years ago
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