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algol13
2 years ago
5

Solving systems of equations using substitution y=7 3x-3y=-18

Mathematics
1 answer:
oksano4ka [1.4K]2 years ago
5 0

Answer:

x = 1

Step-by-step explanation:

If you have any questions feel free to ask in the comments

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the length of a rectangle is five feet less than its width. If the area of the rectangle is 84 square feet, find its dimensions
KIM [24]
Let
x---------> the length of the rectangle
y--------> the width of the rectangle

we know that
A=84 ft²
[area of rectangle]=x*y-----> 84=x*y-----> equation 1
x=y-5------> equation 2
substitute 2 in 1
84=[y-5]*y-----> 84=y²-5y---------> y²-5y-84=0

using a graph tool-----> to resolve the second order equation
see the attached figure

the solution is
y=12
x=y-5-----> x=12-5-----> x=7

the answer is
the length of the rectangle is 7 ft
the width of the rectangle is 12 ft

6 0
3 years ago
which data set has a variation, or mean absolute deviation, similar to the data set given on the dot plot
inessss [21]

Do you know the answer I have the same question

6 0
3 years ago
Read 2 more answers
PLEASE HELP ME!
lawyer [7]
At the beining, he has 76
that is at x=0
y=mx+76

find m
given
when x=2, y=100
find m

100=2m+76
minus 76 both sides
24=2m
divide both sides by 2
12=m

the equatin is

y=12x+76
6 0
3 years ago
Jason is 4.52 feet tall his sister is 0.75 times his hight how tall is his sister
STatiana [176]
His sister is 7.895 feet tall.
3 0
3 years ago
The diagram shows a right-angled triangle.
Otrada [13]

Answer:

h ≈ 9.9 cm

Step-by-step explanation:

By applying tangent rule for the given angle in the given right triangle,

tan(51°) = \frac{\text{Opposite side}}{\text{Adjacent side}}

tan(51°) = \frac{h}{8}

h = 8 × tan(51°)

h = 9.879

h ≈ 9.9 cm

Therefore, measure of side 'h' is 9.9 cm.

3 0
3 years ago
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