All categories

3 years ago

Anybody please help me :( I don’t know the answer ??

Mathematics

2 answers:

enot [183]3 years ago

4 0

elimination means to get rid of one variable by altering the coefficients of variable (by multiplying and diving by some constant number)

in this case, if you just add the two equation, y gets cancelled you get 5x=20 or x=4

put it in any equation to get y (this works because both lines pass through the same point, so they must satisfy that point) to get y=2

vredina [299]3 years ago

3 0

Answer: (4,2)

Step-by-step explanation:

You can solve this systems of equation by substitution, graphing, and elimination

Solving by Elimination was found to be the easiest for me.

3x+2y=16

2x-2y=4

eliminate 2y because a positive and a negative will equal zero.

3x+2x=5x, 16+4=20

5x=20, divide 5 on both sides

x=4

Now we solve for y

You can plug in 4 for x in either equations

I did the first equation

3(4) +2y=16

3*4=12

12+2y=16

-12 -12

2y=4

divide 2 on both sides

y=2

Answer is (4,2)

Mark brainlist please

You might be interested in

Can I get some help please ?

mars1129 [50]

Y intercept is (0, -32)
x intercept is (3.2, 0) or (16/5, 0)

<3

5 0

3 years ago

What decimal is greater 0.732 or 0.75

BARSIC [14]

0.732
0.750

If you have trouble with decimals, then multiply both numbers by a constant number to get rid of the decimals. In this case, we would multiply by 1000.

0.732 x 1000 = 732
0.750 x 1000 = 750

Obviously, 750 is bigger than 732. Therefore, 0.75 is bigger than 7.32.

By the way, this is a property:
If $a \ \textgreater \ b$ , then $a \cdot c ~\ \textgreater \ ~ b\cdot c$

5 0

3 years ago

Read 2 more answers

Is 4/6 bigger than 4/8

GrogVix [38]

No, because 4/6 would round out to 1/3 whereas 4/8 would round down to 1/2

4 0

3 years ago

Read 2 more answers

Given f(x) and g(x) = f(k⋅x), use the graph to determine the value of k.

rewona [7]

Step 1
Find the equation of f(x)
we have the points
(-10,-6) and (0,4)
Find the slope m

The function in slope intercept form is equal to

we have

-----> the point (0,4) is the y-intercept
substitute

step 2
Find the equation of g(x)
we have the points
(-2,-6) and (0,4)
Find the slope m

The function in slope intercept form is equal to

we have

-----> the point (0,4) is the y-intercept
substitute

step 3
Find the value of k
we have

-----> equation A
-----> equation B
----> equation C
substitute equation A and equation C in equation B and solve for k

3 0

3 years ago

Find the volume of the cone if the heights of the solids are equal and the cross sectional areas at every level parallel to the

Arte-miy333 [17]

Answer:

Option B. 93.46 ft³

Step-by-step explanation:

In the given question tow solids are given.

Their heights are same and the cross sectional areas at every level parallel to the respective bases are same which means total volume of solids are also same.

We have to find the volume of the cone.

We know the formula of volume of a pyramid $V=\frac{1}{3}(Area of Base)(Height)$

Now area of the base = area of a right angle triangle = $\frac{1}{2}(Base)(Height)$

Here height of the right angle triangle = 8 ft

and base of the triangle = $\sqrt{Hypotenuse^{2}-height^{2}}=\sqrt{9^{2}-8^{2}}=\sqrt{81-64}=\sqrt{17}=4.12 ft$

Now area of base = $\frac{1}{2}(4.12)(8)=16.49 ft^{2}$

Now volume of cone = volume of pyramid = $\frac{1}{3}(16.49)(17)=\frac{280.37}{3}=93.46ft^{3}$

Therefore Option B. is the answer.

3 0

4 years ago

Read 2 more answers