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Strike441 [17]
3 years ago
10

7-18=______+______=______

Mathematics
1 answer:
ra1l [238]3 years ago
8 0

7-18= a negative number. We know that it'll equal a negative number because the minued(7) is less than the subtrahend(18), which results in a negative number (if both are positive).

We can make an addition problem from this. We can have 18 turn negative and 7 stay positive, and we'll get the same answer.

7+-18=7-18

7-18=7+-18=11

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The zeros of a parabola are 6 and −5. If (-1, 3) is a point on the graph, which equation can be solved to find the value of a in
Elena L [17]

ANSWER

3= a( - 1 +6)( - 1  - 5)

EXPLANATION

The equation of a parabola in factored form is

y = a(x + m)(x + n)

where 'a' is the leading coefficient and 'm' and 'n' are the zeros.

From the question, the zeros of the parabola are 6 and −5.

This implies that,

m = 6 \:  \: and \:  \: n =  - 5

We plug in these zeros to get:

y= a(x +6)(x  - 5)

If (-1, 3) is a point on the graph of this parabola,then it must satisfy its equation.

We substitute x=-1 and y=3 to obtain:

3= a( - 1 +6)( - 1  - 5)

The first choice is correct.

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3 years ago
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3 years ago
20. Find the missing side. Round to the nearest tenth.
nikdorinn [45]

Answer:

A

Step-by-step explanation:

Note

One thing you should automatically notice is that x is larger, much larger than 20. x is the hypotenuse of a right triangle

Formula

Sin(18) = opposite side / hypotenuse

Givens

Sin(18) = 0.30902

opposite = 20

hypotenuse = x

Solution

sin(18) = 20 / x                            Multiply both sides by x

x sin(18) = 20*x /x

x sin(18) = 20                              Divide by sin(18)

x sin(18) / sin18 = 20/sin(18)

x = 20 / 0.30902

answer: x = 64.72

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3 years ago
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