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2 years ago

{ 4 QUESTIONS } Need Help!!

Mathematics

1 answer:

Degger [83]2 years ago

4 0

Answer:

1. A

2.C

3.C

4.C

Step-by-step explanation:

1. 16-(-11) would be 16+11, which equals 27

2. 7-(-16) is just 7+16, which is 23

3. -12-39, You add 39 to 12, which is 51, and add the Negative sign so its C.51

4. Step by step, 5-8 is -3, and -3+-13 would be 10.

Calculators Help!

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In a paint factory, an old conveyer line has filled 20 barrels of paint, and is filling more at a rate of 7 barrels per minute.

vagabundo [1.1K]

It takes 10 minutes for the two lines to have filled an equal number of barrels

Each line will have filled 90 barrels

Solution:

Let "x" be the number of minutes

The old conveyer line has filled 20 barrels of paint, and is filling more at a rate of 7 barrels per minute

Thus, a equation is framed as follows:

Old conveyor: 20 + 7(number of minutes)

Old conveyor: 20 + 7x ------- eqn 1

A worker just switched on a newer line that can fill 9 barrels per minute

Thus, a equation is framed as follows:

New conveyor: 9(number of minutes)

New conveyor: 9x -------- eqn 2

In a little while, the two lines will have filled an equal number of barrels.

Thus, eqn 1 must be equal to eqn 2

$20 + 7x =9x\\\\9x - 7x = 20\\\\2x = 20\\\\x = 10$

Thus it takes 10 minutes for the two lines to have filled an equal number of barrels

How many barrels will each line have filled?

Substitute x = 10 in any one of equations

Substitute in eqn 2

9x = 9(10) = 90

Thus each line will have filled 90 barrels

8 0

3 years ago

Consider the following graph of f(x) what are the zeros

oksano4ka [1.4K]

Answer:

Step-by-step explanation:

The zeroes of a function is where its graph intercepts the x axis:

in this case it happens in these points:

(-6;0) , (-4;0) , (0;0) , (2;0) , (4;0)

4 0

3 years ago

Help pls and thank you!! Oh and fast thx!

horsena [70]

Answer:

Step-by-step explanation:

327.68 .... just multiply 3.2 times 3.2 times 3.2 and then times 10

7 0

2 years ago

Read 2 more answers

Last time, one out of every 4 students in our class was absent. this time, after jen came back only one out of every 5 students

statuscvo [17]

Let x be the number of students in the class the
the number of students in the class when 1 in 4 are absent = x - 0.25x = 0.75x
After Jen returns there are x - 0.2x = 0.80x so we have the equation
0.75x + 1 = 0.80x
0.05x = 1
x = 1 / 0.05 = 20 Answer

So there are 20 students in the class.
No. students not here today = 0.80 * 20 = 16 Answer

3 0

2 years ago

Determine if EF || HL

NISA [10]

Answer:

EF is not parallel to HL.

Step-by-step explanation:

They are not parallel because angle HLG is not equal to angle EFG. If the two lengths WERE parallel, those two angles would be equal. Angle GHL would be equal to angle GEF, but they are not equal, either.

Hope this helps!

3 0

3 years ago