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3 years ago

Please Help Me!!! I will give brainliest!!!

Mathematics

2 answers:

NeTakaya3 years ago

7 0

Answer ; Its answer is 325.

ArbitrLikvidat [17]3 years ago

6 0

Answer:

I believe is b. and d.

Step-by-step explanation:

2/5 * x = 4

x = 4 : 2/5

1 bag is 2/5 kg.

The customer wants to buy 4 kg. So you need to multiply the single bag for a number that will give you 4 in total.

Here is an example with whole numbers, 8nstead of fraction. if the bag was 2 kg, and you want a total of 4kg. You need to multiply that 2 by a number x to get to your total 4. so you will have 2 * x = 4

That’s why you have 2/5 * x = 4

to isolate x, you need to devide both side by 2/5.

2/5 * x = 4

: 2/5 : 2/5 (Divide both sides by 2/5)

x = 4 : 2/5

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Cora’s kitten weighs 1,200 grams. If he weighed 550 grams at the last visit to the veterinarian’s office,

patriot [66]

Percent increase=[(weight change)/(original weight)]*100%
Percent increase=[(1200-550)/550]*100%
=118%

6 0

3 years ago

Read 2 more answers

Any figure that has line symmetry must also have rotational symmetry. true or false

ozzi

A figure that has line symmetry MUST also have a rotational symmetry.

Answer is TRUE.

4 0

3 years ago

Helppppppppp meeeeee?/!)/)/7

LenaWriter [7]

Answer:

18 weeks

So we know that she has $1550 dollars, she has a loss of $82.5 dollars every day. It is division (or subtraction to make it easier). She would have her money over $395 dollars for 18 weeks.

Hope this helps!

7 0

2 years ago

Read 2 more answers

A nationwide sample of influential Republicans and Democrats was asked as a part of a comprehensive survey whether they favored

pickupchik [31]

Answer:

We conclude that there is an equal or larger proportion of Republicans in favor of lowering the standards.

Step-by-step explanation:

The complete question is: A nationwide sample of influential Republicans and Democrats was asked as a part of a comprehensive survey whether they favored lowering environmental standards so that high-sulfur coal could be burned in coal-fired power plants. The results were:

Number sampled: 1,000 (republican) , 800 (democrats)

Number in favor: 200 (republican) , 168 (democrats)

At the 0.02 level of significance, can we conclude that there is a larger proportion of Democrats in favor of lowering the standards? Determine the p-value.

Let $p_1$ = proportion of Republicans in favor of lowering the standards.

$p_2$ = proportion of Democrats in favor of lowering the standards.

SO, Null Hypothesis, $H_0$ : $p_1 \geq p_2$ {means that there is an equal or larger proportion of Republicans in favor of lowering the standards}

Alternate Hypothesis, $H_A$ : $p_1 < p_2$ {means that there is a larger proportion of Democrats in favor of lowering the standards}

The test statistics that would be used here Two-sample z-test for proportions;

T.S. = $\frac{(\hat p_1-\hat p_2)-(p_1-p_2)}{\sqrt{\frac{\hat p_1(1-\hat p_1)}{n_1}+\frac{\hat p_2(1-\hat p_2)}{n_2} } }$ ~ N(0,1)

where, $\hat p_1$ = sample proportion of Republicans in favor of lowering the standards = $\frac{200}{1000}$ = 0.20

$\hat p_2$ = sample proportion of Democrats in favor of lowering the standards = $\frac{168}{800}$ = 0.21

$n_1$ = sample of Republicans = 1000

$n_2$ = sample of Democrats = 800

So, the test statistics = $\frac{(0.20-0.21)-(0)}{\sqrt{\frac{0.20(1-0.20)}{1000}+\frac{0.21(1-0.21)}{800} } }$

= -0.52

The value of z test statistics is -0.52.

Now, P-value of the test statistics is given by the following formula;

P-value = P(Z < -0.52) = 1 - P(Z $\leq$ 0.52)

= 1 - 0.6985 = 0.3015

Now, at 0.02 significance level, the z table gives a critical value of -2.054 for left-tailed test.

Since our test statistic is more than the critical value of z as -0.52 > -2.054, so we have insufficient evidence to reject our null hypothesis as it will not fall in the rejection region due to which we fail to reject our null hypothesis.

Therefore, we conclude that there is an equal or larger proportion of Republicans in favor of lowering the standards.

7 0

3 years ago

What is the tangent ratio for angle f?

ValentinkaMS [17]

Answer:

your answer is 8/6

Step-by-step explanation:

the equation for tangent is opposite side/adjacent side but you cant use the hypotenuse which is 10 so you end up with the opposite side 8 and the adjacent side 6 so the final answer comes to 8/6

5 0

3 years ago