What is the answer to 10-A=3

Mathematics

2 answers:

Radda [10]4 years ago

6 0

The answer is -7. I hope this helps you.

nikitadnepr [17]4 years ago

3 0

-A=-7
A=7 would be the answer.

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FinnZ [79.3K]

<u>Part 1: Finding radius</u>

The radius of a circle is defined as the distance from the center to a point on the circle's circumference.

Using the distance formula,

$r=\sqrt{(-7-8)^{2}+(-1-7)^{2}}=\boxed{17}$

<u>Part 2: Finding the point with x-coordinate -15</u>

Let the y coordinate of the point be y. Then, we have the point (-15, y). Substituting into the distance formula,

$\sqrt{(-15-(-7))^{2}+(-1-y)^{2}}=17\\\\64+(-1-y)^{2}=289\\\\(-1-y)^{2}=225\\\\-1-y =\om 15\\\\y=\boxed{-16, 14}$

4 0

2 years ago

If 10% of a group ate sandwiches two days in a row, and 40% of the group had a sandwich on the first day, this means that 25% of

Charra [1.4K]

The problem can be represented on a Venn diagram, as shown below.

We have P(Day 1 ∩ Day 2) = 0.1 and P(Day 1) = 0.4
We can deduce that 30% of the group ONLY had sandwiches on Day 1 and there's 60% of the group ONLY had sandwiches on Day 2.

We obtain the value 60% = 0.6 from 100%-(10%+30%)=60%

We also can deduce that there 70% of the group that had sandwiches on Day 2

The proportion of people who ate sandwiches on Day 2 GIVEN that they ate sandwiches on Day 1 is given by

P(Day 1 ∩ Day 2)÷P(Day 2) = 0.1÷0.4 = 0.25 = 25%

The statement is TRUE