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Grace [21]
3 years ago
11

If the length of the rectangle is twice the width and the perimeter of the rectangle is 30 cm what is the length and width of th

e rectangle

Mathematics
2 answers:
lorasvet [3.4K]3 years ago
4 0

Answer:length is 60cm and width is 120cm

Step-by-step explanation:

30x2=60cm

60x60=120cm

It is easy peezy

N76 [4]3 years ago
3 0

Step-by-step explanation:

Hope it helps u

Plz Mark as brainlist

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She works as a waitress at a local Emerald Monday restaurant. Her regular hourly wage is $15.50. She regularly works 40 hours pe
lina2011 [118]

Answer:

Her regular weekly pay is $62 and her annual salary is $3100.

Step-by-step explanation:

Given that her hourly wage=$15.50 / hour

As she works 40 hours per week, so her weekly pay = 15.50 x 40 = $62/ week.

If she works 50 weeks each year, so her yearly pay = 62x50=$3100 /year.

Hence, her regular weekly pay is $62 and her annual salary is $3100.

8 0
2 years ago
Twice a number decreased by 16 is 64.
Artyom0805 [142]
You number is 40 40 x 2= 80- 16 =64 your welcome :)
8 0
3 years ago
If x varies directly with y and x = 2.5 when y = 10, funny x when y = 16.
amid [387]

Answer:

Should be 4.0(Not sure tho. my thought process is complicated but to me it makes sense)

Step-by-step explanation:

If y=10 and x =2.5, if y were to = 20, then x would equal 5. so you take that ratio, and say 6 is 3/5's the way to 10, so you also divide 2.5 by 3/5

you get 1.5, you add that to x already and you get 4.0

so if y=16, x should =4.0

3 0
3 years ago
An aircraft factory manufactures airplane engines. The unit cost C (the cost in dollars to make each airplane engine) depends on
butalik [34]

Answer:

90 engines must be made to minimize the unit cost.

Step-by-step explanation:

Vertex of a quadratic function:

Suppose we have a quadratic function in the following format:

f(x) = ax^{2} + bx + c

It's vertex is the point (x_{v}, y_{v})

In which

x_{v} = -\frac{b}{2a}

y_{v} = -\frac{\Delta}{4a}

Where

\Delta = b^2-4ac

If a>0, the minimum value of the function will happen for x = x_v

C(x)=x²-180x+20,482

This means that a = 1, b = -180, c = 20482

How many engines must be made to minimize the unit cost?

x value of the vertex. So

x_{v} = -\frac{b}{2a} = -\frac{-180}{2(1)} = 90

90 engines must be made to minimize the unit cost.

3 0
2 years ago
Mark wants to buy snacks for a road trip at the gas station. He has $8 he can spend on snacks at the gas station. The gas statio
Dvinal [7]

Answer:

i think the answer is A

Step-by-step explanation:

i could be wrong

4 0
3 years ago
Read 2 more answers
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