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3 years ago

4 + 5 = 5 + 4 Is it true or false

Mathematics

2 answers:

babymother [125]3 years ago

4 0

Answer:

it depend on the question but if it is asking if they have the same answer then it is true

Step-by-step explanation:

Elena L [17]3 years ago

3 0

Answer: false

Step-by-step explanation: 4+5=9 5+4=-9

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6. Two points in the plane, ????(19,4) and ????(19,−6), represent the endpoints of the diameter of a circle.

dusya [7]

Answer:

Radius = 5

center is (19,-1)

$(x-19)^2(y+1)^2= 25$

Step-by-step explanation:

Two points in the plane, (19,4) and (19,−6), represent the endpoints of the diameter of a circle.

Distance between the points is calculated using formula

$d=\sqrt{\left(x_2-x_1\right)^2+\left(y_2-y_1\right)^2}$

$=\sqrt{\left(19-19\right)^2+\left(-6-4\right)^2}=10$

diameter = 10

radius = diameter divide by 2

Radius = 5

midpoint is the center of the circle

$\left(\frac{x_2+x_1}{2},\:\:\frac{y_2+y_1}{2}\right)$

$\left(\frac{19+19}{2},\:\frac{-6+4}{2}\right)$

(19,-1)

Equation of the circle

$(x-h)^2(y-k)^2= r^2$

h,k is the center and r is the radius

h=19 and k=-1 , r=5

$(x-19)^2(y+1)^2= 25$

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3 years ago

Which point plotted below has coordinates (4, -2)?

Lady bird [3.3K]

Point d that is option d

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Two-fifths of the senior class earned a grade of B+ or higher on an advanced mathematics exam.

matrenka [14]

2/5 = 42
1/5 = 21
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105 students in the class

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3 years ago

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There are 6 girls and 8 boys invited to the party. What is the ratio of girls to boys

Ber [7]

Answer:

6:8

6/8 or 3/4

Step-by-step explanation:

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the gross income is $215 per week the deductions are $15.16,$29.33,2%,1%,and 3% what is the net income

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Total deductions = $15.16 + $29.33 + $4.30 + $2.15 + $6.45 = $57.39

Net income = $215 - $57.39 = $157.61

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