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vredina [299]
3 years ago
14

The first painter can finish a paint job in 2 hours. The second painter can finish the same job in 8 hours. How long would it ta

ke them to finish the job if they were working together?

Mathematics
1 answer:
vampirchik [111]3 years ago
8 0

Answer: 1\frac{3}{5} hrs

<u>Step-by-step explanation:</u>

1st painter:  \frac{1}{2}

2nd painter: \frac{1}{8}

1st + 2nd = Together

\frac{1}{2} + \frac{1}{8} = \frac{1}{x}

\frac{1}{2}(8x) + \frac{1}{8}(8x) = \frac{1}{x}(8x)

4x + x = 8

5x = 8

 x = \frac{8}{5}

    = 1\frac{3}{5}

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What is the x intercept ?
o-na [289]

Answer:

(3,0)

Step-by-step explanation:

The x-intercept of the line is where the line crosses the x-axis and the y-value is 0.

This line has a slope of

m = \frac{y_2-y_1}{x_2-x_1}= \frac{-48--64}{-15--21} =\frac{-48+64}{-15+21} =\frac{16}{6} =\frac{8}{3}

This means that when -32 becomes -32+8=-24 then its x-value is -9+3 = -6.

Continue this pattern until the y value is 0.

-32+8 = -24 and -9+3 = -6

-24+8 = -16 and -6+3 = -3

-16 + 8 = -8 and -3+3=0

-8+8=0 and 0+3 = 3

The x intercept is (3,0).

5 0
3 years ago
23X-4=20 Help please
k0ka [10]
Isolate both terms with "x" to the left side

23x -(4-4) = 20 + 4

23x - 0 = 24

its impossible to divide both ways because of 0 and 23 with 24 cant divide each other

so your answer would be

x = 23 over 24 or 23/24

hope this helps :D.

6 0
3 years ago
Could a triangle have side lengths of 1.2 ft 1.9ft and 3.1 ft
ss7ja [257]

Answer:

No, a triangle could not have these side lengths.

Step-by-step explanation:

The Triangle Inequality Theorem states that the sum of any 2 sides of a triangle must be greater than the measure of the third side. Let's say side a = 1.2, b = 1.9, and c = 3.1, if we add a+b, then the sums are equal to side c. This would not satisfy the Triangle Inequality Theorem because one configuration of the equation results in the sum and third length being congruent, rather than greater.

4 0
3 years ago
Need help with other math who’s gonna help me brainlest and points
Over [174]
I haven’t done this is a while but I think x=70
7 0
3 years ago
The Math Club is baking pies for a bake sale. The fruit-pie recipe calls for twice as many peaches as nectarines. If it takes a
Natali5045456 [20]

Answer:

56 number of  Nectarines are needed

Step-by-step explanation:

Let  number of Fruit-pie be x and  number of nectarines be y.

Since the fruit pie recipe calls for twice as many peaches as nectarines.

then we have,

x= 2y

It is also given that total of 168 pieces fruit for all pies.

⇒ x+y=168

Substitute x=2y in above equation to solve for y:

 2y+ y =168 or

3y=168

Divide both sides by 3, we get

\frac{3y}{3}= \frac{168}{3}

Simplify:

y = 56

Therefore, 56 nectarines are needed.


7 0
3 years ago
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