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Anna [14]
3 years ago
8

Round 123 to the nearest tens place.

Mathematics
1 answer:
dybincka [34]3 years ago
6 0

Answer:

123

Step-by-step explanation:

All number are less than 5,so it tays as 123

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Find the equation of the line that passes through the points (2, 8) and (-2, 6).
OLEGan [10]

The correct answer is C. y = 1/2x + 7

In order to find this, we first have to look for the slope. We can do that by using the slope formula below.

m(slope) = (y2 - y1)/(x2 - x1)

m = (8 - 6)/(2 - -2)

m = 2/4

m = 1/2

Now we can solve using the slope intercept form and a given point.

y = mx + b

8 = 1/2(2) + b

8 = 1 + b

7 = b

Now we can put these into the equation and model as y = 1/2x + 7

4 0
4 years ago
What’s the value of 9.8z when z=3.1
IrinaK [193]
The answer is 30.38 hope it helps
4 0
3 years ago
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2x + 11 + 6x<br> Combing like terms
Nataly [62]

Answer:8x+11

Step-by-step explanation:2 x+ 6x=8x +11

add 2x to 6x and add 11 to it .

8 0
3 years ago
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The mean breaking strength of yarn used in manufacturing drapery material is required to be at least 100 psi. Past experience ha
Aleks04 [339]

Answer:

Step-by-step explanation:

Given that:

Mean μ= 100

standard deviation σ = 2.6

sample size n = 9

sample mean X = 100.6

The null hypothesis and the alternative hypothesis can be computed as follows:

H_o : \mu \leq 100

H_1 :\mu > 100

The numerical value for the test statistics is :

z = \dfrac{x - \mu}{\dfrac{\sigma}{\sqrt{n}}}

z = \dfrac{100.6- 100}{\dfrac{2.6}{\sqrt{9}}}

z = \dfrac{0.6}{0.8667}

z = 0.6923

At  ∝ = 0.05

t_{\alpha/2 } = 0.025

The critical value for the z score = 0.2443

From the z table, area under the curve, the corresponding value which is less than the significant level of 0.05 is 1.64

P- value =  0.244

c> If the true population mean is 101.3 ;

Then:

z = \dfrac{x - \mu}{\dfrac{\sigma}{\sqrt{n}}}

z = \dfrac{101.3- 100.6}{\dfrac{2.6}{\sqrt{9}}}

z = \dfrac{0.7}{0.8667}

z = 0.808

From the normal z tables

P value  =  0.2096

3 0
3 years ago
Insert two geometric means between 729 and 64​
Liula [17]

Answer:

324 and 144

Step-by-step explanation:

We require

a₁, a₂, a₃, a₄

where a₂ and a₃ are the required geometric means

The n th term of a geometric sequence is

a_{n} = a₁(r)^{n-1}

where a₁ is the first term and r the common ratio

Here a₁ = 729 and a₄ = 64, thus

729(r³) = 64 ( divide both sides by 729 )

r³ = \frac{64}{729} ( take the cube root of both sides )

r = \sqrt[3]{\frac{64}{729} } = \frac{4}{9} , then

a₂ = 729 × \frac{4}{9} = 81 × 4 = 324

a₃ = 324 × \frac{4}{9} = 36 × 4 = 144

Thus

729, 324, 144, 64

8 0
3 years ago
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