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Aleks04 [339]
3 years ago
15

How to solve a classmate draws a parallelogramfor whichone side is twice as long as the other. If one side is 26 units, what are

all the possible lengths of the perimeter?
Mathematics
1 answer:
Mandarinka [93]3 years ago
6 0

Answer: length when perimeter is 78 units: a=26 ,b=13

Length when perimeter is 156 units:

a=26 , b=52

Step-by-step explanation: Given one side =26 , the other is twice as long

Perimeter of a parallelogram =2(a+b)

Using perimeter=78= 2(26+b)

78=52+2b

78-52=2b

26=2b

b=26/2

b=13

When perimeter is 78 units a=26,b=13

Using perimeter =156 units

156=2(26+b)

156=52+2b

156-52=2b

104=2b

b=104/2

b=52

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-30 divided by (2+8-8) =
Julli [10]

Answer:

-15

Step-by-step explanation:

Remember to follow PEMDAS. PEMDAS =

Parenthesis

Exponents (& Roots)

Multiplication

Division

Addition

Subtraction

Solve the parenthesis:

(2 + 8 - 8) = (10 - 8) = 2

Divide:  -30/2 = -15

-15 is your answer.

5 0
3 years ago
Can someone smart help me with this plz:)
insens350 [35]

Answer:

Step-by-step explanation:

Sum of all angles of triangle = 180°

6p + 6p + 3 p = 180

15p = 180

p = 180/15

p = 12

Angles are:

6p = 6*12 = 72°

3p = 3*12 = 36°

Angles are: 72°, 72° , 36°

6 0
3 years ago
If p and q are both true, then which of the following statements has the same truth-value as ~p → q?
olganol [36]

If p and q are both true, then

\neg p \implies q

is an implication of the form

F \implies T

which is true, because every implication starting with false is true, i.e.

F \implies T = T,\quad F \implies F = T

So, we're looking for an expression evaluating to true. Let's see what we have:

A) is an AND proposition. Logical AND is true only if both parts are true. So, you have

\neg P \land \neg Q = F \land F = F

So it's not the right option.

B) is an OR proposition. Logical OR is true whenever one of the two parts is true. So, you have

\neg P \lor\neg Q = F \lor F = F

So it's not the right option.

C) is again an AND proposition. You have

P \land \neg Q = T \land F = F

So this is not the right option.

D) Finally, the last one is again an implication, and again it starts with false:

\neg Q \implies P = F \implies T = T

So this is true, and thus is the correct option.

8 0
3 years ago
Helppp plsssss!! Asap<br><br>Thanks
lubasha [3.4K]

Answer:

Ithink the answers B

Step-by-step explanation:

I think this because its even


3 0
3 years ago
If you place a cup of 210 degree Fahrenheit coffee on a table in a room that is 68 degrees fareinheit, and ten minutes later, it
Lana71 [14]
Newton's Law of Cooling

Tf=Ts+(Ti-Ts)e^(-kt)   where Tf is temp at time t, Ts is temp of surroundings, Ti is temp of object/fluid.  So we need to find k first.

200=68+(210-68)e^(-10k)

132=142e^(-10k)

132/142=e^(-10k)

ln(132/142)=-10k

k=-ln(132/142)/10

k≈0.0073  so 

T(t)=68+142e^(-0.0073t)  so how long until it reaches 180°?

180=68+142e^(-0.0073t)

112=142e^(-0.0073t)

112/142=e^(-0.0073t)

ln(112/142)=-0.0073t

t= -ln(112/142)/(0.0073)

t≈32.51 minutes


8 0
3 years ago
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