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tangare [24]
4 years ago
14

Evaluate the expression for the given values.

Mathematics
2 answers:
kozerog [31]4 years ago
8 0

substitute a and b then solve

Mamont248 [21]4 years ago
5 0

14+-6=8

The answer is 8 if you need more help I got you.

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kelly is knitting a scarf for her brother. it took her 1/3 hour to knit 3/8 foot of the scarf. How fast is Kelly's knitting spee
marysya [2.9K]
9/8 per hour 
hope this helps if so please mark me brianliest
5 0
3 years ago
Read 2 more answers
Can someone help me solve this... Please!​
CaHeK987 [17]

Answer:

Step-by-step explanation:

At a building site, an iron girder of mass 400 kg is suspended from a crane by a steel cable. Assume that the cable has a circular cross-section of diameter 24 mm.

a.What is the tensile force in newtons on the cable given that force = mass × g (where the acceleration due to gravity, g = 9.8 m s−2). Ignore the mass of the cable.(2 marks)

b.Calculate the cross-sectional area of the cable in square metres.(3 marks)

c.Show that the stress on the cable is 8.67 × 106 N m−2. Again ignore the mass of the cable.(3 marks)

d.If the Young’s modulus of the steel cable is 200 × 109 N m−2, calculate the strain in the cable.(3 marks)

e.When it is loaded with the iron girder, the steel cable stretches by 0.78 mm. Calculate what the original length of the steel cable was (i.e. its length prior to loading).(4 marks)

TOTAL: 15 marks

show working

4 0
3 years ago
Can someone answer this question please please answer it correctly and please show work please help me I need it
Delvig [45]

Answer:

Answers are below

Step-by-step explanation:

48) Expression for Shipping charges for Supplier 1 is S = 16x + 0.05

      Expression for Shipping Charges for Supplier 2 is S = 18x + 0.07

      Expression for Total Cost for Supplier 1 is C = (16x + 0.05)0.9

      Expression for Total Cost for Supplier 2 is C = (18x + 0.07)0.8

If he ordered 15 T-shirts from each supplier, you need to use the second set of expressions.

Supplier 1 - (16(15) + 0.05)0.9 = (240 + 0.05)0.9 = (240.05)0.9 = $216.05

Supplier 2 - (18(15) + 0.07)0.8 = (270 + 0.07)0.8 = (270.07)0.8 = $216.06

In total the coach spent 216.05 + 216.06 = $432.11 for both suppliers

36) D because surveying the 85 people means that they are unbiased on their favorite sport. The 15 people were all on the soccer team, so they would pick soccer.

37) C because 2/3 cups times 1.5 would equal one cup. Now multiply the 3/4 pound of blueberries by 1.5.       3/4 x 1.5 = 1.125 = 1 1/8

38) A because a 25% chance of snow is a low chance of snow. If the percent was over 50%, then there would be a high chance.

34) D because both are ways of finding the discounted price, but Michael's way is preferred because there are less steps involved.

35) C because it is the middle number and it shows the average speed during the trials.

If these answers are correct, please make me Brainliest!

3 0
3 years ago
"Find the sum of the first 50 term in this sequence 4, 7, 10, 13, ...". How do i do this without writing them all out, and how d
melisa1 [442]
First term ,a=4 , common difference =4-7=-3, n =50
sum of first 50terms= (50/2)[2×4+(50-1)(-3)]
=25×[8+49]×-3
=25×57×-3
=25× -171
= -42925
derivation of the formula for the sum of n terms
Progression, S
S=a1+a2+a3+a4+...+an

S=a1+(a1+d)+(a1+2d)+(a1+3d)+...+[a1+(n−1)d]   →   Equation (1)

S=an+an−1+an−2+an−3+...+a1

S=an+(an−d)+(an−2d)+(an−3d)+...+[an−(n−1)d]   →   Equation (2)

Add Equations (1) and (2)
2S=(a1+an)+(a1+an)+(a1+an)+(a1+an)+...+(a1+an)

2S=n(a1+an)
S=n/2(a1+an)

Substitute an = a1 + (n - 1)d to the above equation, we have
S=n/2{a1+[a1+(n−1)d]}
S=n/2[2a1+(n−1)d]
5 0
3 years ago
If you know how to solve this, Please answer it. Thank You
Ber [7]

Answer:

11

Step-by-step explanation:

(2(-5)+13) + (-4+12)

7 0
3 years ago
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