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Andrew [12]
2 years ago
7

Why is 3 + (−5) equal to −2?

Mathematics
1 answer:
tamaranim1 [39]2 years ago
5 0

Answer: since the 5 is a negative you are subtracting it from 3

so 3 +(-5) is actually 3-5. which = -2

Step-by-step explanation:

Hope this helps

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Please help me for gods sake:(
IgorLugansk [536]

Answer:

Step-by-step explanation:

y=3x-2, plug in each for x and y on the table and they work

8 0
3 years ago
a survey was taken of children between the ages 7 and 12. let A be the event that the person rides the bus to school, and let B
galben [10]

Answer:

The statement is true about whether A and B are independent eventa is fourth option:

A and B are not independent events because P(A/B)=0.375 and P(A)=0.25

Step-by-step explanation:

Let A be the event that the person rides the bus to school, then:

P(A)=75/300

P(A)=0.25

Let B be the event that the person has 3 or more siblings, then:

P(B)=24/300

P(B)=0.25


P(A/B)=9/24

P(A/B)=0.375


Like P(A/B)=0.375 is different to P(A)=0.25 the events are not independent


Answer. Fourth option:

A and B are not independent events because P(A/B)=0.375 and P(A)=0.25

8 0
3 years ago
Read 2 more answers
a photographer is taking the 4th grade class picture. She stands on a ladder to get a better angle . From the top step of the la
Kruka [31]
Given:
a ladder with three steps.
top step is 45° angle.

45° / 3 steps = 15°

So, top step is 45°. Middle step is 30°. Bottom step is 15°. Ground is 0°

The photographer would shout on the bottom step at an angle of 15°.
4 0
3 years ago
Cramer's rule:
Irina18 [472]

Answer:

a. \quad\dfrac{\left|\begin{array}{cc}148&14\\246&5\end{array}\right|}{\left|\begin{array}{cc}-2&14\\3&5\end{array}\right|}=52

Step-by-step explanation:

To find the value of x, Cramer's rule says you replace the x-coefficients with the equation constants to form the matrix whose determinant is the numerator of the fraction. The denominator is the determinant of the matrix of coefficients. The equation constants are 148 and 246, so you expect to find those in the first column of the numerator (answer choices A and C).

\dfrac{\left|\begin{array}{cc}148&14\\246&5\end{array}\right|}{\left|\begin{array}{cc}-2&14\\3&5\end{array}\right|}=\dfrac{-2704}{-52}=52

The calculation is carried out correctly only in answer choice A.

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3 years ago
What is the percentage ratio of 7:5:12
N76 [4]
It’s 11.6% yw

Its incorrect :
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2 years ago
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