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Contact [7]
3 years ago
11

ac{7}{8}" alt="\frac{3}{5} + \frac{7}{8}" align="absmiddle" class="latex-formula">
This is 3/5 +7/8
Btw these are fractions
Please this is for 20 points help me
Mathematics
2 answers:
STatiana [176]3 years ago
8 0

the answer is

\frac{59}{40}

in decimal form it's 1.475

Masja [62]3 years ago
3 0

59/40, or in decimal form 1.475

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A chemist has 30% and 40% solutions of acid available. How many liters of each solution should be mixed to obtain 65 liters of 3
mars1129 [50]

Answer:

30 = 80 %

40= 20 %

Step-by-step explanation

I'm sorry for not writing how to do it but it's something like if 30 = 100 then if we had 40 occupying 20 percent of that acid then we will get 32 percent

5 0
3 years ago
A worker on a scaffolding 75 ft above the ground needs to lift a 500 lb bucket of cement from the ground to a point 30 ft above
Lemur [1.5K]

Answer:

W = 15900 ft.lb

Step-by-step explanation:

From the given information.

Consider y to be the distance from the ground towards the bucket of the cement.

At height y, suppose the bucket is lifted by Δy.

Then, the workdone can be = 500Δy + 0.5(75 - y) Δy

where;

The bucket of the cement =  500Δy

The remaining of the rope =  0.5(75 - y) Δy

However; the workdone (W) can be calculated as:

W = \int^{30}_{0} \ 500 \ dy + \int^{30}_{0} \ 0.5 (75-y ) \ dy

W = 500 \times 30 + 0.5 \bigg(75 \times 30 - \dfrac{1}{2} \times 30^2 \bigg )

W = 15000 + 0.5 ( 2250 - 450)

W = 15000 + 900

W = 15900 ft.lb

6 0
3 years ago
Y= x^3 + 8x^2 +5x<br> work out the coordinates of the two turning points
aliya0001 [1]

Answer:

(-5, 50) and (-1/3, -0.815)

Step-by-step explanation:

The equation is;

y = x³ + 8x² + 5x

Now the turning point will occur at where dy/dx = 0.

Thus;

dy/dx = 3x² + 16x + 5

At dy/dx = 0, we have;

3x² + 16x + 5 = 0

From quadratic formula, we can get;

x = -5 or -⅓

Thus, let's find y at this points.

y = -5³ + 8(-5)² + 5(-5)

y = -125 + 200 - 25

y = 50

Also,at x = -⅓, we have;.

y = (-⅓)³ + 8(-⅓)² + 5(-⅓)

y = -1/27 + 8/9 - 5/3

y = -0.815

Thus,the coordinates of the turning points are;

(-5, 50) and (-1/3, -0.815)

6 0
3 years ago
Can someone help me me I think I'm bad at this honestly..
Fed [463]

Answer:

J

A=7.07cm^2

Step-by-step explanation:

A= (pi)(r^2)

diameter=3

radius= 1/2 of the diameter = 1.5

pi = approximately 3.14

A= (3.14) (1.5)^2

A= 7.065 ----> rounds to 7.07

7 0
3 years ago
The table lists recommended amounts of food to order for
Otrada [13]

Lasagna: 25 5/8 (mixed number)

Deli meats: 10 5/6 (also a mixed number)

for the fried chicken, my envision has 26 and yours has 24 so I sadly can't help w that but if you press "question help" and press "view an example" it'll teach you how to do it

3 0
3 years ago
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