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Schach [20]
3 years ago
12

How do you solve: 2(5+r)A :7+rB: 10+2rC: 12rD: 7+2r

Mathematics
1 answer:
maksim [4K]3 years ago
3 0

Answer:

i think it´s b

Step-by-step explanation:

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You roll a number cube. What is the probability that you roll an even number or a number less than 5?
NISA [10]
Let’s first see the probability of landing an even number. We have 6 sides, and 3 are labeled with an even number. So our chances of rolling a number cube are 3/6 (or 1/2 when simplified).

Next, the probability of rolling a number less then five is 4/6 (or 2/3 simplified), since we have 4 sides labeled with a number less than 5.

To compute two or more probabilities, we multiply them. In this case, the fractions already share the same denominator, 6 (because it’s a cube with 6 sides). So we get:

3/6 * 4/6

We then square 6, which is 36, and multiply 3 by 4, which is 12. This gives us 12/36, which is 1/3 in simplified form.

So there’s out answer: 1/3.
7 0
1 year ago
Fill in the blank for the following two-column proof.<br> Given: 3x+1=-14 Prove: x=-5
VladimirAG [237]

Answer:

x does equal -5

Step-by-step explanation:

Add -1 to each side.

1+-1+3x-14+-1

Combine the like terms.

0+3x=-14+-1

3x=-14+-1

3x=-15

Divide that by 3.

x= -5

Hope this helps. Plz give brainliest.

5 0
3 years ago
Read 2 more answers
Lnes made9 necklaces with 60 beads on each necklaces. How many beads did she use in all
Gala2k [10]
Made 9  necklaces.
60 beads per necklace.
How many beads for all the 9 necklaces?

60 × 9 = 540

9 necklaces = 540 beads<span />
3 0
3 years ago
If u = &lt;-7, 6&gt; and v = &lt;-4, 17&gt;, which vector can be added to u + 3v to get the unit vector &lt;1, 0&gt; as the resu
ivann1987 [24]

With u = <-7, 6> and v = <-4, 17>, we have

u + 3v = <-7, 6> + 3 <-4, 17> = <-7, 6> + <-12, 51> = <-19, 57>

We want to find a vector w such that

u + 3v + w = <1, 0>

Subtract u + 3v from both sides to get

w = <1, 0> - (u + 3v) = <1, 0> - <-19, 57>

w = <20, -57>

7 0
3 years ago
4x-5=2x-3
Lemur [1.5K]
X = 4 Hope You In Joy I Did The Math My Self
7 0
3 years ago
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