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3 years ago

Please help me, these problems are so hard, will mark as brainliest for people who solve it the fastest!!

Mathematics

1 answer:

enot [183]3 years ago

4 0

Answer:

13) A. 290 miles 14) A. 2 1/3 in

Step-by-step explanation:

Take 7.25 divided by 0.5, the scale on the map.

7.25/0.5 = 14.5

Take this value times the 20 miles to solve the real distance in miles

20 x 14.5 = 290 miles

14) Take 3.5 times 2/3 to find the side length of the new square

3.5 x 2/3 = 2 1/3

If these answers are correct, please make me Brainliest!

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Which phrase accurately describes a distribution that's bell-shaped but not symmetric

enot [183]

A skewed distribution

4 0

3 years ago

A researcher is interested in whether there is a significant difference between the mean age of marriage across three racial gro

Ivenika [448]

Answer:

The P-value is < significance value ( 0.05 ) hence we reject the Null hypothesis ( i.e. There is an association between the race and average age at marriage )

Step-by-step explanation:

Conducting an F-test to determine association between race and average age at marriage

step 1 : State the hypothesis

H0 : ц1 = ц2 = ц3

Ha : ц1 ≠ ц2 ≠ ц3

step 2 : determine the mean square between

Given mean value of all groups = 23.33

SS btw = 113*(25.39 - 23.33)² + 904*(22.99 - 23.33)² + 144*(23.89 - 23.33)^2 = 113(4.2436) + 904(0.1156) + 144(0.3136)

= 629.1876

hence: df btw = 3 - 1 = 2

df total = 1161 - 1 = 1160

df within = 1160 - 2 = 1158

SS within = 36.87*1158 = 42695.46

Therefore the MS between = 629.19 / 2 = 314.60

The F-ratio = 314.59 / 36.87 = 8.53

using the values for Btw the P-value = 0.00021

The P-value is < significance value ( 0.05 ) hence we reject the Null hypothesis ( i.e. There is an association between the race and average age at marriage )

7 0

3 years ago

10) Solve the system by the elimination method. Check the solution.

Galina-37 [17]

Answer:

x =2, y = 2

Step-by-step explanation:

$x + 2y = 6....(1) \\ -x + 5y = 8....(2) \\ adding \: equations \: (1) \: and \: (2) \\ x + 2y = 6\\ -x + 5y = 8 \\ - - - - - - - \\ 7y = 14 \\ y = \frac{14}{7} \\ \huge \red{ \boxed{ y = 2}} \\ substituting \: y = 2 \: in \: equation \: (1) \\ x + 2 \times 2 = 6 \\ x + 4 = 6 \\ x = 6 - 4 \\\huge \purple{ \boxed{ x = 2}} \\ \\ \huge \orange{ \boxed{(x, \: y) = (2, \: 2)}}$

8 0

3 years ago

Read 2 more answers

Please help ! I’ll give brainliest

Hunter-Best [27]

Answer:

the answer is a) 100*

the angles it is bigger than is an acute angle (below 90)* and a right angle (exactly 90*) so the answer is anything above 90* and so it has to be 100*

5 0

3 years ago

Nita gana $ 20 por semana paseando al perro de su vecino. También gana $ 2 por cada rosa que vende de su jardín de rosas. Nita q

Rudik [331]

Answer:

La situación está representada por el siguiente sistema:

$y = 20+2\cdot x$

$y \ge 50$

Donde:

$x$ - Cantidad de rosas vendidas semanalmente.

$y$ - Ganancia semanal, medida en dólares.

Step-by-step explanation:

De acuerdo con el enunciado, Nita gana una cantidad fija cada semana por pasear al perro de su vecino, con un monto de $ 20, mientras que gana en función de la cantidad de rosas a vender, con un valor unitario de $ 2. Si ella desea ganar al menos $ 50, por tanto, se requiere construir el siguiente sistema, conformado por una ecuación y una inecuación:

$y = 20+2\cdot x$ (1)

$y \ge 50$ (2)

Donde:

$x$ - Cantidad de rosas vendidas semanalmente.

$y$ - Ganancia semanal, medida en dólares.

4 0

3 years ago