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Viefleur [7K]
3 years ago
5

Which ordered pair is a solution to the equation 4x + 7y = –5?

Mathematics
1 answer:
anzhelika [568]3 years ago
8 0
 (–4, 3) would be your correct answer  
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A box of nails weighs 130 pounds when it is 2/3 full. It weighs 74 pounds when it is 3/8 full. What is the weight of the box?
NeTakaya
Let the weight of the full Volume of nails in the box be W.
Let the weight of the box be B.

2/3 W  + B =  130 ........i          From the first statement.
3/8 W  + B =      74 ......ii         From the second statement.

Equation (i)  Minus (ii)

2/3 W  - 3/8 W + B  - B =  130 - 74
(16W  - 9W) / 24                 = 56

7W / 24  =  56.
W        =  56 * 24 / 7
W        =    192  Pounds.

Substituting V = 64 in equation (i)
2/3 W  + B =  130
2/3 * 192  + B =  130
2 * 64  + B =  130
128  + B =  130
B =  130 -128 = 2.

Therefore, weight of box, B = 2 pounds.

7 0
3 years ago
Shawn uses 45N of force to stop the cart 1 meter from running his foot over. How much work does he do?​
zalisa [80]

Answer:

\boxed {\boxed {\sf 45 \ Joules}}

Step-by-step explanation:

Work can be found by multiplying the force by the distance traveled in the direction of the force.

W=F*d

The force is 45 Newtons.

The distance traveled is 1 meter.

F=45 \ N \\d= 1 \ m

Substitute the values into the formula.

W=45 \ N * 1 \ m

Multiply.

W=45 \ N*m

1 Newton meter is equal to 1 Joules.

Therefore our answer of 45 Newton meters is equal to 45 Joules.

W= 45 \ J

The work done is <u>45 Joules.</u>

5 0
2 years ago
Read 2 more answers
If F(x) = 1/2 x²-3, find F(6)<br><br> A. 21<br> B. 3<br> C. 15<br> D. 69
Nina [5.8K]

Answer:

I dont know about that??????

7 0
2 years ago
If f(x)=3[x-2],what is f(5.9)?<br> 9 <br> 10<br> 11<br> 12
inna [77]
<span>f(x)=3[x-2]
So, f(5.9) = ?
f(5.9) = 3(5.9 - 2)
=3(3.9)
=11.7 = 12
Thus, the answer is 12.

</span>
8 0
2 years ago
Read 2 more answers
PLSSSSSSS HELPPPPPPP I WILL GIVE BRAINLIESTTTTTTTTTT!!!!!!!!!!!!!!!!!!!!!PLSSSSSSS HELPPPPPPP I WILL GIVE BRAINLIESTTTTTTTTTT!!!
Semenov [28]

Answer:

1/20

Alternate from 0.05, 20 - 1

Hope this helps

7 0
2 years ago
Read 2 more answers
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