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2 years ago

50 out of 100 flowers are red. What percentage of the flowers are red

Mathematics

1 answer:

GuDViN [60]2 years ago

7 0

Answer:

50%

Step-by-step explanation:

duhh, sorry this one just very obvious

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Show that B = {[a, b) ⊂ ℝ | a < b} is a basis for a topology on ℝ

loris [4]

Answer:

Remember that a set $\mathcal{B}$ is a base for some topology on $\mathbb{R}$ if satisfy the following properties:

1. $\mathbb{R}=\cup\{B: B\in\mathcal{B}\}$

2. For $B, B^* \in \mathcal{B}$ , If $p\in B\cap B^*$ then exist $B_p\in\mathcal{B}$ such that $p\in B_p\subset B\cap B^*$ .

Now, for $B=\{[a,b)\subset\mathbb{R}| a < b\}$ we verify the above properties:

1. It's clear that $\mathbb{R}=\cup_{a,b \text{ with }a$

2. Let $B=[a,b), B^*=[c,d) \in \mathcal{B}, p\in B\cap B^*$ . Without loss of generality suppose that $a$ . Then $c\leq p < b$ , this implies that $p\in[c,b)$ and $B_p=[c,d) \in \mathcal{B}$ and $B_p\subset B\cap B^*$ .

Then, B satisfy the two properties. This show that B is a basis for a topology in $\mathbb{R}$

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3 years ago

Yall pls help meeeee (brainliest btw)!!!!!

Korvikt [17]

<h2>Answer:</h2>

Let m be the amount each mom can paint and d be the amount each daughter can paint.

On the first day, 8 mothers were painting so the mothers painted 8m square feet. 12 daughters also painted so the daughters painted 12d square feet. The total amount painted on the first day is then 8m+12d square feet. Since 220 square feet was painted on the first day, then 8m+12d=220. Dividing both sides by 4 gives a simplified equation of 2m+3d=55.

On the second day, 6 mothers were painting so the mothers painted 6m square feet. 8 daughters also painted so the daughters painted 8d square feet. The total amount painted on the second day is then 6m+8d square feet. Since 152 square feet was painted on the second day, then 6m+8d=152

Multiply the first equation by -3 and then add it to the second equation to eliminate m and solve for d:

d=13

2m+3d=55

2m+3(13)=55

2m+39=55

2m=16

m=8

Therefore each mom painted 8 square feet and each daughter painted 13 square feet.

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3 years ago

Expressing the given functions

OLga [1]

$\bf \begin{cases}
f(x)=x^2\\
g(x)=7x-5
\end{cases} \qquad (f\circ g)(x)\iff f(\ g(x)\ )
\\\\\\
f(\ g(x)\ )=[g(x)]^2\implies f(\ g(x)\ )=(7x-5)^2\impliedby h(x)$

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3 years ago

Number 4 only plzzz help asap its due tomorrow

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B:
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2 years ago

Name a coordinate point located in quadrant 4

sergiy2304 [10]

A point in quadrant 4 could be (-4,-2)

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3 years ago

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