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3 years ago

The trinomial x2 + bx + c factors to (x + m)(x + n). If b is negative and c is positive, what must be true about m and n?

Mathematics

2 answers:

julia-pushkina [17]3 years ago

4 0

They must both be negative Answer

maria [59]3 years ago

3 0

Answer:

m and n are both negative

Step-by-step explanation:

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Which figures can be precisely defined by using only undefined terms

Lelu [443]

If I'm correct line segment, parallel lines, and Circle.

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3 years ago

The points (-18,15) and (-20,15) lie on a circle with a radius of 1. Find the coordinates of the center of the circle.

FromTheMoon [43]

.hello :
an equation of the circle Center at the w(a,b) and ridus : r is :
(x-a)² +(y-b)² = r²
in this exercice : r = 1
The points (-18,15) and (-20,15) lie on a circle with a radius of 1:
(-18-a)²+(15-b)² = 1 ....(1)
(-20-a)² +(15-b)² = 1 ....(2)
solve this system :
(1) -(2) : (-18-a)² - (-20-a)² =0
(-18-a)² =(-20-a)² =0
( -18-a = -20-a) or (-18-a = - (-20-a))
1 ) ( -18-a = -20-a) no solution confused : -18=-20
2 ) -18-a =20+a
-2a =38
a = -19
subst in (1) :(-18+19)²+(15-b)² =1
(15-b)² = 0.... 15-b = 0 .... b = 15
the center is :w(-19,15)

6 0

3 years ago

Pleaseee helpppp:)))

matrenka [14]

Answer:

<h2>Option B:</h2><h3>112 families </h3>

Step-by-step explanation:

Given,

No. of families = 75

Out of 75 no. of families had cars = 42

Out of 1, no. of families can have cars

$= \frac{42}{75}$

Therefore, 

Out of 200 families, no. of families had cars

$= 200 \times \frac{42}{75}$

$=200 \times \frac{14}{25}$

= 8 × 14

= 112

Hence, 

option B is correct as 112 families have cars out of 200 families (Ans)

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2 years ago

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4vir4ik [10]

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3 years ago

What is 9/16 rounded to the nearest whole number?

Levart [38]

Answer:

Step-by-step explanation:

9/16=.5625

Round that to the nearest whole number would be 1

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3 years ago