true or false?
A researcher calculates the expected value for the number of girls in three births. He gets a result of 1.5. He then rounds the result to 2, saying that it is not possible to get 1.5 girls when three babies are born. Is this reasoning correct? Explain.
The two numbers multiply to 64 and add up to negative 16 are -8, -8.
What is Algebraic expression ?
Algebraic expressions are numbers expressed using letters or alphabets without specifying their values. Algebra taught us how to express unknown values using letters such as x, y, and z. There can also be a single value that is placed before and multiplied by a variable in an algebraic expression in addition to these letters, which are called variables.
Let us assume first number be = x
and, let the second number be = y
then,
multiplication of two number will be :
xy = 64...(1)
addition of two numbers will be -16 that is :
x + y = -16..(2)
we have :
(x+y)² - (x-y)² = 4xy
(x-y)² = (x+y)² - 4xy
(x-y)² = (-16)² - 4 x 64
(x-y)² = 256 - 256
(x-y)² = 0
(x-y) = 0
x = y
Now, from equation (2) we have ":
x + y = -16
x + x = -16
2x = -16
x = y= -8
Therefore, the two numbers multiply to 64 and add up to negative 16 are -8, -8.
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-x^2-x+19=y
X=y+80
The equation is D=17.5*t
Step-by-step explanation:
Rachel took 4 seconds to reach 70 meters away from the safe zone.
Finding the speed she took to drive away from the safe zone will be;
Speed=Distance/time
S=D/T
S=70/4 =17.5 m/s
D=17.5 * t -----where D is the distance (in meters) from the safe zone after t seconds.
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To find speed: brainly.com/question/2583051
Keyword : speed, equation, distance
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Answer:
y = 166 – 24x
Step-by-step explanation:
first let us solve the distance of the safe zone from the building
let x = be the distance she traveled after 4 s
x = (24 m/s)( 4 s)
x = 96 m
since she is 70 m away at that time. So the distance of the safe zone is 70 m + 96 m = 166 m
so the function is:
y = 166 – 24x