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poizon [28]
3 years ago
14

Can someone please explain to me how to find the answer 7+ 4x + 5x

Mathematics
1 answer:
EleoNora [17]3 years ago
5 0
Since you have two numbers that have a (x) at the ends of them, you add those first then add seven which will end up being 9x+7
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A radio arm saw has a circular cutting blade with a diameter of 10 inches and it spins at 2000rpm if there are 12 cutting teeth
FinnZ [79.3K]

Answer:

12565.11 teeth approximately cut cross the cutting surface per seconds.

Step-by-step explanation:

Since the diameter is 10inches, the circumference of the arm saw is 10π (circumference is πd where d is diameter).

The number of teeth on the cutting blade can be gotten by multiplying the diameter by 12 since we have 12 teeth per inch on the arm saw

Number of teeth on saw = 12 x 10π = 120π.

To get the number of teeth that cross the cutting surface in 2000rpm we multiple it by the total number of teeth in just one rpm.

So we have 2000 x 120π. But since we are asked to find it in revolution per seconds then 2000r/m = 2000r/60s ≈ 33.33

Therefore, we have

33.33 x 120π ≈ 12565.11 teeth

7 0
3 years ago
Ella is a landscape photographer. One weekend at her gallery she sells a total of 52 prints for a total of $2,975. A small paint
rosijanka [135]
<h2>Answer:37 paintings of $50 and 15 paintings of $75</h2>

Step-by-step explanation:

Let x be the number of paintings Ella sells for $50.

Let y be the number of paintings Ella sells for $75.

Profit made through $50 paintings is 50x

Profit made through $75 paintings is 75y

So,total profit is given by 50x+75y

It is given that total profit is $2975

So,50x+75y=2975      ..(i)

Given that the total number of prints is 52

So,x+y=52      ..(ii)

using (i) and (ii),

50x+75(52-x)=2975\\50x+3900-75x=2975\\25x=925\\x=37

y=52-x=52-37=15

7 0
3 years ago
Read 2 more answers
What is the slope of the line 3y=4x+5?<br> Answer choices: <br> A. 5/3<br> B. 4/3<br> C. 2<br> D.4
yawa3891 [41]

Answer:

B. 4/3

Step-by-step explanation:

slope-intercept formula is y=mx+b, where m is the slope and y has to be by itself.

dividing 4 by 3 cant be more simplified than 4/3.

7 0
3 years ago
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The scale on a map is 1 : 500000 <br> Two towns are 7cm apart on the map
KengaRu [80]

1 : 500,000

multiplied by 7 cm is

7 cm : 3,500,000 cm

= 7 cm : 35000.00 m . . . (100 cm in 1 m)

= 7 cm : 35 km . . . (1000 m in 1 km)

The actual distance between the towns is 35 km.

5 0
3 years ago
How many repeating digits are in 0.536
creativ13 [48]
There are 3 repeating digits in 0.536 because there are 3 numbers behind the decimal
4 0
3 years ago
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