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Westkost [7]
3 years ago
12

What is the answer to this equation?

Mathematics
1 answer:
Maurinko [17]3 years ago
6 0
So I’ll do question 3. So normally you see f(x)= something plus x (something like that) you see it as a function of x.

So that notation of f(-1) means the function of -1. Which means you need to sub in -1 for x.

f(x)=-5x+5
f(-1)=-5(-1)+5
Negative times a negative is a positive
f(-1)=5+5
f(-1)=10
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Rzqust [24]

Answer:

20%

Step-by-step explanation:

i divided the percentages each by 45 and so% was 4.4. 20% was the closest to 45.

5 0
3 years ago
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Use a system of equations to solve this problem.Bronze is a mix, or alloy, of tin and copper. A metal worker needs 100 g of bron
d1i1m1o1n [39]

Answer:

x = 50 grs

y = 50 grs

Step-by-step explanation:

" x "   is quantity of bronze of 5% tin

" y "   is quantity of bronze of 45% tin

The worker needs 100 grs of bronze and this bronze must be 25% tin

The mathematical expression for the 100 grs condition is:

x + y = 100

And the The mathematical expression for the % condition is:

0,05*x  + 0.45*y  = 0,25 * ( x + y )

The system is:

x + y = 100

0,05*x + 0,45*y = 0,25* ( x + y )

Solving this system we get values of x and y

y = 100 - x

0,05*x  + 0,45* ( 100 - x ) = 0,25 * ( x + 100 - x )

0,05*x  + 45 - 0,45*x = 0,25*( 100 )

0,05*x  + 45 - 0,45*x  = 25

- 0,4*x  = -45 + 25

x = 20/0,4            x = 50  grs

and y = 50 grs

8 0
3 years ago
Round 249798.828806 to the nearest ten.
loris [4]

Answer:

249798.8

Step-by-step explanation:

It should say to the nearest tenth.

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What is the answer to this math problem 40+40x0+1=
Anna71 [15]
PEMDAS is 
Parenthesis
Exponets
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Divide
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therefore, you would do 40*0=0+40+1=41 
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3 years ago
A digital scale measures weight to the nearest 0.2 pound. Which
AnnyKZ [126]

Answer:

A

Step-by-step explanation:

This option contains a number that would appear on this scale.

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