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kicyunya [14]
3 years ago
10

A scale drawing uses the scale 3 in. = 20 ft. Find the missing measure. 57 in. = ____ ft

Mathematics
1 answer:
liberstina [14]3 years ago
6 0
380 feet would be your answer
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yesterday, there was 80 problems assigned for math homework. harry did 20% of them correctly. how ,many problems did harry get r
Igoryamba
400 i think i am pretty sure but if it's wronge i apolize 


3 0
3 years ago
Read 2 more answers
1. Write a quadratic function, in standard form, that fits the set of points. Solve it as a system of three equations
sasho [114]

Answer:

The equation is y=2x^2+4x-7

Step-by-step explanation:

Let the quadratic function be


y=ax^2+bx+c


The point (-4,9) must satisfy this function,

\Rightarrow a(-4)^2+b(-4)+c=9


\Rightarrow 16a-4b+c=9...(1)


The point (0,-7) must also satisfy this function,

\Rightarrow a(0)^2+b(0)+c=-7


\Rightarrow c=-7...(2)



The point (1,-1) must also satisfy this function,

\Rightarrow a(1)^2+b(1)+c=-1


\Rightarrow a+b+c=-1...(3)


We put equation 2 into equation 1 to get;


\Rightarrow 16a-4b-7=9


\Rightarrow 16a-4b=16


\Rightarrow 4a-b=4...(5)


We again put equation 2 into equation 3 to get;


\Rightarrow a+b-7=-1


\Rightarrow a+b=6...(6)


We add equation 5 and 6 to get;

5a=10


\Rightarrow a=2


We put a=2 into equation 6 to get;


2+b=6


\Rightarrow b=6-2


\Rightarrow b=4


The equation is therefore y=2x^2+4x-7

5 0
3 years ago
Please answer this fast
Inessa [10]

Answer:

Step-by-step explanation:

23x-12-4x+5x

24x-12  combine the 23x-4x+5x to get 24x

19-14+3x+12x

15x+5     19-14=5   3x+12x=15x

6x+19-14x+9

-8x+28    -14x+6x= -8x   19+9=28

3 0
3 years ago
Read 2 more answers
En una carrera de autos compiten William, José, Lucas, Oscar e Iván. Quien acierte los dos primeros lugares, en cualquier orden,
Nina [5.8K]
Do you speak english
4 0
3 years ago
Divide. Then, check with multiplication.
luda_lava [24]

Answer:

a.= 3.714

b.= 2.405

Step-by-step explanation:

a. 3.714 x 21 = 78

b. 2.405 x 37 = 89

5 0
3 years ago
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