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2 years ago

Please help ASAP. The picture is above

Mathematics

2 answers:

Setler [38]2 years ago

7 0

Every triangle’s inner angles’ addition equals to 180°
So if we find the x:
38°+x+2°+x=180°
40°+2x=180°
2x=180°-40°=140°
x=140°/2
x=70°
Now if we find the I hope this helped :)

masha68 [24]2 years ago

5 0

The correct answer is 70 degrees

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What times what equals 21 but adds up to -22

attashe74 [19]

Let "what" and "what" be A and B

Put this in an algebraic equation
A * B = 21
A + B = -22

A must = -21 and B must = -1 , this is because two negatives multiply to make a positive

A + B = -22 , -21 +-1 = -22

4 0

3 years ago

3 (4x + 7) = 43; 12x + 21 = 43

777dan777 [17]

Answer:

Distributive property

Explanation:

You are distributing the 3 to the parenthesis to get 12x+21 =43

6 0

3 years ago

Read 2 more answers

A. When x = -1, what is the value of y?

pogonyaev

Answer:

i think we need more context to this answer. I’d love to help no need to retype. You can just message me for help :)

Step-by-step explanation:

7 0

3 years ago

The lee's spend $ 31 on movie tickets for 2 adults and 3 children. The Smith's spent $ 26 on movie tickets for 2 adults and 2 ch

Trava [24]

Answer:

Cost of adult ticket is $8 and Cost of children ticket is $5.

Step-by-step explanation:

Given:

Let the cost of each Adult ticket be 'x'.

Let the cost of each child ticket be 'y'.

Now Given:

The lee's spend $ 31 on movie tickets for 2 adults and 3 children.

Number of adult tickets = 2

Number of children ticket = 3

Total money spent = $31

So we can say that;

Total money spent is equal to sum Number of adult tickets multiplied by cost of each Adult ticket and sum Number of children tickets multiplied by cost of each child ticket.

framing in equation form we get;

$2x+3y=31 \ \ \ \ equation \ 1$

Also Given:

The Smith's spent $ 26 on movie tickets for 2 adults and 2 children

Number of adult tickets = 2

Number of children ticket = 2

Total money spent = $26

So we can say that;

Total money spent is equal to sum Number of adult tickets multiplied by cost of each Adult ticket and sum Number of children tickets multiplied by cost of each child ticket.

framing in equation form we get;

$2x+2y=26 \ \ \ \ equation \ 2$

Now Subtracting equation 2 from equation 1 we get;

$2x+3y-(2x+2y)=31-26\\\\2x+3y-2x-2y=5\\\\y=\$5$

Now substituting the value of y in equation 1 we get;

$2x+3y=31\\\\2x+3\times5 =31\\\\2x+15=31\\\\2x=31-15\\\\2x=16x\\\\\frac{2x}{2}\frac{16}{2}\\\\x=\$8$

Hence Cost of adult ticket is $8 and Cost of children ticket is $5.

6 0

3 years ago

a) Suppose that a large mixing tank initially holds 300 gallons of water in which 50 pounds ofsalt have been dissolved. Pure wat

Kay [80]

Answer:

x = 50*e∧ -t/100

Step-by-step explanation:

We assume:

1.-That the volume of mixing is always constant 300 gallons

2.-The mixing is instantaneous

Δ(x)t = Amount in - Amount out

Amount = rate * concentration*Δt

Amount in = 3 gallons/ min * 0 = 0

Amount out = 3 gallons/min * x/ 300*Δt

Then

Δ(x)t/Δt = - 3*x/300 Δt⇒0 lim Δ(x)t/Δt = dx/dt

dx/dt = - x/100

dx/ x = - dt/100

A linear first degree differential equation

∫ dx/x = ∫ - dt/100

Ln x = - t/100 + C

initial conditions to determine C

t= 0 x = 50 pounds

Ln (50) = 0/100 * C

C = ln (50)

Then final solution is:

Ln x = - t/100 + Ln(50) or

e∧ Lnx = e ∧ ( -t/100 + Ln(50))

x = e∧ ( -t/100) * e∧Ln(50)

x = e∧ ( -t/100) * 50

x = 50*e∧ -t/100

4 0

2 years ago