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Sindrei [870]
3 years ago
8

X+2y =3 -x+y=6 elimination

Mathematics
2 answers:
Neko [114]3 years ago
8 0
You can try using the formula y=mx+b
nika2105 [10]3 years ago
8 0
X=3-2y

plug that into the second equation

-(3-2y)+y=6
-3+2y=6
2y=6+3
2y=9
y=9/2
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What is the total surface area
Stels [109]

We have two right triangles and three different rectangles.

The formula of an area of a right triangle:

A_T=\dfrac{1}{2}l_1l_2

l₁, l₂ - legs

We have l₁ = 20cm and l₂ = 21cm. Substitute:

A_T=\dfrac{1}{2}(20)(21)=(10)(21)=210\ cm^2

The formula of an area of a rectangle:

A_R=lw

l - length

w - width

We have:

rectangle #1: l = 22cm, w = 29cm

A_{R1}=(22)(29)=638\ cm^2

rectangle #2: l = 22cm, w = 21cm

A_{R2}=(22)(21)=462\ cm^2

rectangle #3: l = 22cm, w = 20cm

A_{R3}=(22)(20)=440\ cm^2

The total Surface Area of the triangular prism:

S.A.=2A_T+A_{R1}+A_{R2}+A_{R3}\\\\S.A.=2\cdot210+638+462+440=1960\ cm^2

3 0
3 years ago
WILL GIVE BRAINLIEST IF CORRECT NOT TOO HARD JUST IN A RUSH!!!!!
STALIN [3.7K]

Answer:

22.5

Step-by-step explanation:

If you divide y/x each ticket costs $2.5, so multiply 2.5x9 and that's your answer. :)

3 0
3 years ago
Suppose xy=−4 and dy/dt=−3. Find dx/dt when x=−1.
user100 [1]
When x=-1: \quad (-1)y=-4\qquad\to\qquad y=4\)

Ok that gives us a little more information.
If we implicitly differentiate with respect to t, from the very start, then we can apply our product rule, ya?

x'y+xy'=0

The right side is zero, derivative of a constant is zero.
Where x' is dx/dt and y' is dy/dt.

From here, plug in all the stuff you know:
y' = -3
x = -1
y = 4

and solve for x'.

Hope that helps!
4 0
3 years ago
Hakeem can make 7 free throws in 2 minutes how many would he make in 18 minutes if you continue at the same rate
Nuetrik [128]

Answer:

63 free throws.

Step-by-step explanation:

18/2 = 9

7 x 9 = 63

Sooooo......

ya

8 0
3 years ago
Help please this is hard sheet attached
deff fn [24]

Answer:

88 cm²

Step-by-step explanation:

6*2*2+2*2= 28 cm² sides

6*3*2= 36 cm² top and bottom

3*4*2= 24 cm² front and back

28+36+24= 88 cm²

5 0
3 years ago
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