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3 years ago

Which equation is related to this equation? k ÷ 4 = 13

Mathematics

1 answer:

Vilka [71]3 years ago

6 0

$k \div 4 = 13\\\\\sf This~is~the~same~thing~as:\\\\k\div 4\times 4 = 13\times 4\\\\\boxed{k=13\cdot4}$

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Find the X intercepts of the equation f(x) = x^2 - 6x + 6

Arturiano [62]

Answer:

x-intercepts = (x ≈ -0.87), (x ≈ 6.87)

Step-by-step explanation:

let x = 0, in equation for x-intercepts

solve for x using the

quadratic formula

x = −6 ± √ 36 + 24

= −6 ± √60

−2x

= −6 ± 2 √ 15

−2 = 3 ± √15

8 0

3 years ago

The angles of a triangle are in the ratio of 2 : 12 : 16. The sum of all the angles in a triangle must equal 180 degrees. What i

UkoKoshka [18]

If the ratios are 2:12:16 the equation that should be used is 2x + 12x + 16x = 180.

First solve for x:

2x + 12x + 16x = 180

30x = 180

x = 6

Then plug x back in to find the degrees for each angle:

2x = 2(6) = 12

12x = 12(6) = 72

16x = 16(6) = 96

These are the degrees for each triangle: 12 degrees, 72 degrees, and 96 degrees which adds up to 180 degrees in total.

The equation, also at the top, is 2x + 12x + 16x = 180.

3 0

3 years ago

Zachary visits a flower shop to purchase roses to be delivered to his mother for her birthday. The cost of the roses is modeled

Afina-wow [57]

Answer:

y = 2.5 + 4.75, every additional rose sold , x, increases the cost of the rose, y, by 2.50

Step-by-step explanation:

8 0

3 years ago

Math problem need help plz

alexira [117]

Answer:

angle LXZ is 121°

Step-by-step explanation:

Since the sum of same side interior angles equals 180 you just subtract the angle you're given from 180 (180°-59°=121°)

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3 years ago

A toy manufacturer wants to know how many new toys children buy each year. A sample of 1492 children was taken to study their pu

julia-pushkina [17]

By assuming the standard deviation of population 2.2 the confidence interval is 8.67 toys,8.94 toys.

Given sample size of 1492 children,99% confidence interval , sample mean of 8.8, population standard deviation=2.2.

This type of problems can be solved through z test and in z test we have to first find the z score and then p value from normal distribution table.

First we have to find the value of α which can be calculated as under:

α=(1-0.99)/2=0.005

p=1-0.005=0.995

corresponding z value will be 2.575 for p=0.995 .

Margin of error=z*x/d

where x is mean and d is standard deviation.

M=2.575*2.2/ $\sqrt{1492}$

=0.14

So the lower value will be x-M

=8.8-0.14

=8.66

=8.67 ( after rounding)

The upper value will be x+M

=8.8+0.14

=8.94

Hence the confidence interval will be 8.67 toys and 8.94 toys.

Learn more about z test at brainly.com/question/14453510

#SPJ4

8 0

2 years ago