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4 years ago

Please help me with #3

Mathematics

1 answer:

oksano4ka [1.4K]4 years ago

8 0

I think u would do 3.5x 3 to find the area of that triangle

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antoniya [11.8K]

$-\dfrac{3}{10}+\dfrac{2}{3}=\dfrac{2}{3}+\left(-\dfrac{3}{10}\right)=\dfrac{2}{3}-\dfrac{3}{10}\\\\\text{We must find the common denominator.}\\\\Multiples\ of\ 3:0,\ 3,\ 6,\ 9,\ 12,\ 15,\ 18,\ 21,\ 24,\ 27,\ \boxed{30},\ 33,\ 36,...\\\\Multiples\ of\ 10:\ 0,\ 10,\ 20,\ \boxed{30},\ 40,\ 50,\ 60,...\\\\\dfrac{2}{3}=\dfrac{2\cdot10}{3\cdot10}=\dfrac{20}{30}\\\\\dfrac{3}{10}=\dfrac{3\cdot3}{10\cdot3}=\dfrac{9}{30}\\\\\dfrac{2}{3}-\dfrac{3}{10}=\dfrac{20}{30}-\dfrac{9}{30}=\dfrac{20-9}{30}=\dfrac{11}{30}$

4 0

3 years ago

A genetic experiment involving peas yielded one sample of offspring consisting of 430 green peas and 155 yellow peas. Use a 0.05

Dimas [21]

Answer:

the null and alternative hypothesis are

$H_{0}$ : p=0.24

$H_{a}$ : p≠0.24

Test statistic is 1.416.

P-Value is 0.1568

We fail to reject the null hypothesis under 0.05 significance level

<em>At 0.05 significance</em> we cannot say that the proportion of offspring peas will be yellow is not 0.24 (24%)

Step-by-step explanation:

Let p be the proportion of offspring peas will be yellow. Then,

$H_{0}$ : p=0.24

$H_{a}$ : p≠0.24

test statistic can be calculated as

z= $\frac{p(s)-p}{\sqrt{\frac{p*(1-p)}{N} } }$ where

p(s) is the sample proportion of yellow offspring peas ( $\frac{155}{155+430} =0.265$
p is the proportion of yellow offspring peas assumed under null hypothesis. (0.24)

N is the sample size (585)

Test statistic is z= $\frac{0.265-0.24}{\sqrt{\frac{0.24*0.76}{585} } }$ ≈ 1.416.

Using z-table, we can find that P-Value is 0.1568

We fail to reject the null hypothesis under 0.05 significance level since 0.157>0.05

We can conclude that <em>at 0.05 significance</em> we cannot say that the proportion of offspring peas will be yellow is not 0.24 (24%)

6 0

3 years ago

What is increase 620 by 35%?

amm1812

620 --> aumentando 35%
35% de 620 = 35*620/100 = 35*62/10 = 217 (aumento)
Montante = 620 + 217 = 837

5 0

4 years ago

Read 2 more answers

abigail is putting tiles on a table top. she needs 48 tiles for each row of 8. each row will have 6 white tiles. the rest of the

AleksandrR [38]

If there are 48 tiles in each row then minus 48 - 6 white tiles = 42 purple tiles. And if there are 8 rows then 8 x 42 = 336. So Abigail needs 336 purple tiles.

hoped I helped

3 0

3 years ago

WILL GIVE BRAIN

astra-53 [7]

Answer:

1. 60.50(0.20)

2. 34(0.15) <How much the coupon takes off

3. 157.30(0.10) <How much the coupon takes off

4. 10.49/58.25 <The percentage of the tip

5. 94.20(0.20) <The percentage of the tip

94.20(0.15) <How much the coupon takes off of the price of the meal.

<h3>Hope I helped!</h3>

3 0

3 years ago

Read 2 more answers