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Liula [17]
3 years ago
15

How to work it out now!!

Mathematics
1 answer:
hodyreva [135]3 years ago
3 0
4) Use the formula for the area of a trapezium. Consider what the possible range of the various numbers might be, given their reported value, and how changes in value affect the area.

The area will be in the interval [445, 455) cm^2.
The length of the shorter parallel side will be in the interval [17.5, 18.5) cm.
The length of the longer parallel side will be in the interval [21.5, 22.5) cm.
The area is given by
.. A = (b1 +b2)/2*h
.. h = 2A/(b1 +b2)

h will get smaller when A gets smaller, so we want to do our calculation with the minimum value of A, 445 cm^2.
h will get smaller when b1 and b2 get larger, so we want to do our calculation with the maximum values of those numbers, 18.5 and 22.5 cm.

The minimum value of h will be
.. h = 2*(445 cm^2)/(18.5 cm +22.5 cm) = 21.7 cm


5. In the worst case, the lorry is limited to a load of
.. (14.5 -2.35)/(.255) = 47 . . . . crates

This is computed as the minimum safe additional load divided by the maximum mass per crate.
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This includes evaluate numerica expressions
kkurt [141]

Answer:

1. (29 + 19) ➗ 3

     (48) ➗ 3

     48➗ 3

There are 16 cards in each pile

Step-by-step explanation:

2. 14           3. 110           4. 71       5. 54          6. 16            7. 23

8. 75          9. 32           10. 22     11. 20         12. 48          13. 53

14. Spit 6 in half to get Melinda's length so the answer is 3

15.  No the answer is not the same because you have to minus 18 to 8 (which is in the parenthesis) so the answer is 10.  But the other way around you have to add 15 (which is in the parenthesis) plus 5.

I really hope I helped you

6 0
2 years ago
Solve by looking for the X
Kryger [21]

Answer:

It is a

Hope this helps you

3 0
2 years ago
Evaluate (7^2))^-2/7^-4
Ymorist [56]

Answer:

the answer is 3.78

Step-by-step explanation:

7 0
3 years ago
I’m having trouble understanding how to solve this someone please help ASAP thank you!
vladimir2022 [97]

Answer:

Answer is 71.95°

Step-by-step explanation:

Cosine formula is

a^2=b^2+c^2-2bc(cosA)

cos A =b^2+c^2-a^2/2bc

if a= 119,b=94,c=173

cos A=94^2+173^2-119^2/2(94*173)

=8836+29,929-14,161/2(16,262)

=38765-14,161/32,524

=24604/32,524

=0.7564

cos A=0.7564

cos^-1=40.85°.that's for angle A.

Using the same formula

B=31.1°

C=180-(40.85+31.1)

C=180-71.95

C=108.05

Since angle on a straight line is 180

therefore x is 71.95

Also the sum of angles A and B

3 0
1 year ago
find an equation for the perpendicular bisector of the line segment whose endpoints are (-8,-5) and (-4,1)
lbvjy [14]

Answer:

y = -x - 8

Step-by-step explanation:

Midpoint of the line:

x = (x1 + x2)/2 = (-8 + -4)/2 = -12/2 = -6

y = (y1 + y2)/2 = (-5 + 1)/2 = -4/2 = -2

so midpoint is (-6,-2)

Slope of the line: Slope m = (y2-y1)/(x2-x1)

m = (-1 - -5)/(-4 - -8) = (-1 + 5)/(-4 + 8) = 4/4 = 1

Perpendicular lines have slopes that are negative reciprocals of one another

so slope of the perpendicular line is -1/1 is -1

y = mx + b

y = -x + b

Using (-6,-2)

-2 = -(-6) + b

-2 = 6 + b

b = -8

so y = -x - 8

6 0
2 years ago
Read 2 more answers
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