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3 years ago

Solve (x + 2 < 5) (x - 7 > -6).

Mathematics

1 answer:

ratelena [41]3 years ago

8 0

Answer:

Hopefully can help you..

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Find the value of x.

dezoksy [38]

Answer:

x = 61

Step-by-step explanation:

x and 29 are complementary angles so they add to 90 degrees

x+29 = 90

Subtract 29 from each side

x+29-29 = 90-29

x = 61

3 0

3 years ago

Read 2 more answers

Slop intercept form of: y-5=2(x+2)

saw5 [17]

Answer: y= 2x+9

have a good day!

6 0

3 years ago

The product of 8 and the total of z and 3

dedylja [7]

Answer:

is this question right please check once

6 0

3 years ago

A physical education department wanted a single test of upper body strength that was easy to administer. Dips on the parallel ba

Gennadij [26K]

Answer:

24.23 ; 13.47 ; 0.782 ; p value < 0.00001 ;7.45

Step-by-step explanation:

Given that :

ΣX = 3,416, ΣY = 1,899, SDX = 8.84, SDY = 4.70, ΣZXZY = 109.416

Sample size, N = 141

Mean of X:

£X / N = 3416 / 141 = 24.23

Mean of Y:

£Y / N = 1899 / 141 = 13.47

B.) Correlation between the 2 variables :

£ZXZY / N - 1

= 109.416 / 140

= 0.782

C.)

Level of significance and p value :

T = [Rsqrt(n-2)] ÷ sqrt(1 - R²)

T = [0.782 * sqrt(139)] ÷ sqrt(1-0.782^2)

T = 14.79

P value from Tscore calculator

Df = 141 - 2 = 139 ; α = 0.05

Pvalue = 0.00001

Pvalue < α ; Hence, a significant positive relationship exists.

To obtain regression model :

Slope = £ZXZY / SDX²

m = 109.416 / 8.84^2 = 1. 4

yintercept = meanY - slope*x

yintercept = 13.47 - 1.4*24.3

yintercept = - 20.55

Equation in slope intercept form:

y = mx + c

y = 1.4x - 20.55

For x = 20

y = 1.4(20) - 20.55

y = 7.45

5 0

3 years ago

Persons taking a 30-hour review course to prepare for a standardized excam averago a score of 620 on that exam. Persons taking a

wolverine [178]

Answer:

S(t) = 4.725t + 478.25

S(t) = 4.725(42)+478.25

S(t) = 676.7

Step-by-step explanation:

In the question, score is a function of time, that means time is the x-axis, while score is the y-axis.

Order the pairs to get:

(30,620) and (70, 809)

With these values, you use the the equation $\frac{x2-x1}{y2-y1}$ to get the slope m.

$\frac{70-30}{809-620} = 4.725$

Use this equation and input any ordered pair to get the final function.

y-y1 = m(x-x1)

y-620 = 4.725x-141.75

y = 4.725x + 478.25

Replace x with t and y with S(t) to fit the x & y axis of the question.

6 0

3 years ago