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2 years ago

I need serious help! marking brainliest

Mathematics

1 answer:

astraxan [27]2 years ago

6 0

Answer:

a) 14

b) 9

c) 10

Step-by-step explanation:

Given:

1 bag = 126 g of buttons
Weight of Button A = 9 g

⇒ Number of Button As in one bag = 126 g ÷ 9 g = 14 buttons

Given:

1 bag = 126 g of buttons
Weight of Button B = 14 g

⇒ Number of Button Bs in one bag = 126 g ÷ 14 g = 9 buttons

Given:

The box contains 230 g of buttons
The box contains the same number of each type of button

Let x = number of buttons of each type.

⇒ 9x+ 14x = 230

⇒ 23x = 230

⇒ x = 10

Therefore, there are 10 of each type of button in the box.

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In Δ ABC and ΔXYZ ,∠B=∠X=90 and BC=XZ .What additional information is required to make Δ ABC congruent to ΔXYZ by R.H.S conditio

Pani-rosa [81]

Answer:

AC = XY

Step-by-step explanation:

A triangle is a polygon with three sides and three angles. The types of triangles are scalene triangle, equilateral triangle, right angled triangle and obtuse triangle.

Two triangles are said to be congruent if all the three sides and three angles of one triangle is equal to the three sides and three angles of the other triangle.

In Δ ABC and ΔXYZ ,∠B=∠X=90. This means that triangle ABC and triangle XYZ are right angled triangle since one of their angles is 90 degrees.

The hypotenuse is the side opposite to right angle (90 degrees).

Therefore AC is the hypotenuse of triangle ABC and YZ is the hypotenuse of triangle XYZ.

If the hypotenuse and one leg of a right angled triangle is equal to the hypotenuse and leg of another right angled triangle, then the two triangles are congruent by RHS rule.

Since BC = XY, for Δ ABC congruent to ΔXYZ by R.H.S condition, the hypotenuse have to be equal, i.e. AC = XY

7 0

3 years ago

A researcher wished to compare the effect of two stepping heights (low and high) on heart rate in a step-aerobics workout. A col

Alinara [238K]

Answer:

The answer is "between 0.10 and 0.05".

Step-by-step explanation:

For sample 1:

$n_1 = 25\\\\\bar{x_1} = 90.00\\\\ s_1 = 9\\\\$

For sample 2:

$n_2 = 25\\\\ \bar{x_2} = 95.08\\\\ S_2 = 12\\\\$

Calculating the null and alternative hypotheses:

$H_O : \mu_1 = \mu_2 \\\\ H_Q : \mu_1$

Calculating the test statistic:

$Z= \frac{90-95.08}{ \sqrt{\frac{9^2}{25}+\frac{12^2}{25}}} \\\\ =\frac{-5.08}{ \sqrt{\frac{81}{25}+\frac{144}{25}}}\\\\=\frac{-5.08}{ \sqrt{\frac{81+144}{25}}}\\\\=\frac{-5.08}{ \sqrt{\frac{225}{25}}}\\\\=\frac{-5.08}{ \frac{15}{5}}\\\\=\frac{-5.08}{3}\\\\= -1.693$

Calculating the conservative degrees of freedom:

$DF = min (n_1 -1, n_2 - 1) = min(25-1, 25-1) = 24$

by using Excel the p-value for left tailed test and for test statistic will be $-1.693$ with $DF = 24$ .

$\to p-value = TDIST(1.693, 24, 1) = 0.0517\ \ \ \ i.e, \bold{0.05 < p-value < 0.10}$

5 0

3 years ago

KAKAKAKA REMAVADE YAYAYA HELP

goldenfox [79]

Answer:

Its b

Step-by-step explanation:

you line them up then multiply the denominator of 3/4 to match 1/8. So if 4x2=8 then you do 3/4x2=6/8. so then the answer would be B and 7/8

Hope that helped and it wasnt confusing haha. (to simplify the answer if B and 7/8)

7 0

4 years ago

This is a two part question! Please help me!!!

Lana71 [14]

Answer:

A=4ft²

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Step-by-step explanation:

4 0

3 years ago

Determine the equation of a line in standard form that represents alanas training progress. Her progress points corresponds to t

elixir [45]

Answer:

The equation of the line passing through the above points is:

$y=-\frac{1}{2}x+\frac{29}{2}$

Step-by-step explanation:

Given:

The two points are: $(x_1,y_1)=(1,14)\textrm{ and }(x_2,y_2)=(9,10)$

The equation of a line when two points are given is:

$y-y_1=\left (\frac{y_2-y_1}{x_2-x_1} \right )(x-x_1)$

Plug in all the values and simplify.

$y-14=\left (\frac{10-14}{9-1} \right )(x-1)\\y-14=\left (\frac{-4}{8} \right )(x-1)\\y-14=-\frac{1}{2}(x-1)\\y-14=-\frac{1}{2}x+\frac{1}{2}\\y=-\frac{1}{2}x+\frac{1}{2}+14\\\\\\y=-\frac{1}{2}x+\frac{29}{2}$

Therefore, the equation of the line passing through the above points is:

$y=-\frac{1}{2}x+\frac{29}{2}$

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4 years ago