What is the answer, please help!

Mathematics

1 answer:

algol [13]3 years ago

5 0

I don’t see the answers on the screen

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If the total area of a picture measuring 10 inches by 12 inches plus a matting of uniform width surrounding the picture is 224 s

ELEN [110]

Let
x-----------> <span>uniform width surrounding the picture

we know that
(10+2x)*(12+2x)=224-----> 120+20x+24x+4x</span>²=224
4x²+44x+120-224=0
4x²+44x-104=0

using a graph tool-----> to resolve the second order equation
see the attached figure

the solution is
x=2 in

the answer is
2 inches

4 0

3 years ago

The diameter of a car wheel is 60 cm, if the car travels at an average speed of 13.2m/s, find the number of revolutions made by

mixer [17]

The wheel has diameter 60 cm = 0.60 m, and thus circumference π(0.60 m) ≈ 5.923 m.

In one complete revolution, a point on the edge of the wheel covers this distance, so that the wheel has an angular speed of

(13.2 m/s) * (1/5.923 rev/m) ≈ 2.229 rev/s

There are 60 seconds to each minute, and 60 minutes to each hour, so converting to rev/h gives

(2.229 rev/s) * (60 s/min) * (60 min/h) ≈ 8024 rev/h

3 0

3 years ago

Can someone help me solve 3x-4y>-4

ahrayia [7]

What do you mean by solve?
Put in slope-intercept form would be: y<(3/4)x+1

4 0

3 years ago

Type the expression that results from the following series of steps:

Sever21 [200]

6-z

Z-6 would be wrong because the question said start with 6

3 0

2 years ago

Find ST. Help me solve please and thank you

slava [35]

Answer: ST is equal to 12

Step-by-step explanation:

If RU is equal to 24 as a whole and we are given that RS and TU are equal to 6 then we could set up an equation and solve for ST.

6 + 6 +x = 24 where x is the length of ST

12 + x = 24

-12 -12

x = 12

6 0

3 years ago