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mezya [45]
4 years ago
12

Tara is making a necklace and decorating it with hand-painted designs and various beads. The necklace has four (4) sections that

are 2 1/4 inches long and two (2) sections that are 5 1/2 inches long. What is the total length of the necklace?
Mathematics
1 answer:
AfilCa [17]4 years ago
5 0
Graduated round bead with all ... 9 beads, 5 inch long strand, $ 250. the distored beads at the end are some kind of ... bring out the wild child in you, 1/2 inch tall, $ 18.
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A parallelogram has a base of length xplus 7 and a height of xplus 2 and has an area of 50 square units. Find the base and heigh
iris [78.8K]

Hello,


(x+7)(x+2)=50\\\Rightarrow\ x^2+9x+14=50\\\Rightarrow\ x^2+9x-36=0\\\Rightarrow\ x^2+12x-3x-36=0\\\Rightarrow\ x(x+12)-3(x+12)=0\\\Rightarrow\ (x+12)(x-3)=0\\\Rightarrow\ x=-12\ or\ x=3\\If \ x=-12\ then\ x+7

7 0
4 years ago
AREAS AND VOLUMES OF SIMILAR SOLIDS URGENT?
Novosadov [1.4K]

Two similar prisms have proportional dimensions. Find the ratio between lengths of these prisms:

k=\dfrac{7}{5}.

The ratio between volumes of similar prisms is

\dfrac{V_{large}}{V_{small}}=k^3.

If volume of small prism is 50 cub. m, then

\dfrac{V_{large}}{50}=(\dfrac{7}{5} )^3=\dfrac{343}{125},\\V_{large}=\dfrac{343\cdot 50}{125} =137.2cub. m.

Answer: 137.2 cub. m.

6 0
4 years ago
Find the value of x, rounded to the nearest tenth
Nimfa-mama [501]

Answer:

x = 12.5

Step-by-step explanation:

The given triangle is a right angle triangle.

We cannot use the Pythagoras theorem as the lengths of all sides are not known. We will use triangular ratios here to solve the given problem.  

As it is clear from the diagram that x is the hypotenuse of the triangle and 11 is the length of the base. We will use a ratio in which base and hypotenuse are used.

So,

cos ⁡θ= base/hypotenuse

cos⁡ 28=11/x

x=11/cos⁡28  

x=11/0.8829

x=12.45

Rounding off to nearest 10

x=12.5

8 0
3 years ago
Read 2 more answers
A sample of 66 obese adults was put on a low-carb diet for a year. The average weight loss was 11 pounds and the standard deviat
Illusion [34]

Answer:

The 99% lower confidence bound for the true average weight loss is 3.98 pounds.

This means that we can be 99% sure that the mean weight loss for all obese adults on a low-carb diet is positive.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.99}{2} = 0.005

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.005 = 0.995, so z = 2.575

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 2.575*\frac{19}{\sqrt{66}} = 6.02

The lower end of the interval is the sample mean subtracted by M. So it is 11 - 6.02 = 3.98 pounds

The 99% lower confidence bound for the true average weight loss is 3.98 pounds.

This means that we can be 99% sure that the mean weight loss for all obese adults on a low-carb diet is positive.

7 0
3 years ago
Read 2 more answers
PLEASE HELP ME FAST!!! ( It's about finding linear equations on a graph)
balandron [24]

Answer:

y = 7x

Step-by-step explanation:

The equation of a line passing through the origin is

y = mx ( m is the slope )

Calculate m using the slope formula

m = \frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

with (x₁, y₁ ) = (0, 0 ) and (x₂, y₂ ) = (100, 700 ) ← 2 points on the line

m = \frac{700-0}{100-0} = \frac{700}{100} = 7

y = 7 x ← equation of line

7 0
3 years ago
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