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antoniya
1 day ago
8

The equation x2 – 1x – 90 = 0 has solutions {a, b}. What is a + b

Mathematics
2 answers:
PIT_PIT [9.1K]1 day ago
8 0
X^2 - x - 90 =0
This quadratic equation is in the standard format ax^2+ bx + c
The total of the solutions can be found using -b/a (where a and b are the coefficients from the original equation, not the solutions)
The resulting answer is 1/1 = 1
Zina [9.1K]1 day ago
3 0

Answer:

Step-by-step explanation:

Let's begin.

The equation presented is: x^2-1x-90=0

This represents a quadratic equation.

The standard format of a quadratic equation is: AX^2+BX+C=0

By relating the current equation to the standard format, the coefficients A, B, and C are:

A is 1

B is -1

C is -90

The roots a and b of the equation enable us to apply the formula for the sum of roots a+b which is given by = \frac{-B}{A}

Thus, a+b will yield 1: Answer

Hope this is helpful:)

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There are 35 students in art class and 57 students in dance class. Find the number of students who are either in art class or in
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Answer:

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Step-by-step explanation:

Designate arts students as A and dance students as D.

Thus, we have,[['[TAG_14]]

n(A) = 35

n(D) = 57

Required

To determine n(A or D)

For (a):

We find that:

n(A and D) = 12

The calculation for n(A or D) is as follows:

n(A or D) = n(A) + n(D) - n(A and D)

n(A or D) = 35 + 57 - 12

n(A or D) = 80

b. Given the details

n(A and D) = 0 since no students are enrolled in both classes as indicated in (a)

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Step 2

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y=mx+b

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Substituting yields:

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21 day ago
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