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3 years ago

Add using the number line. 8+(−4) Drag and drop the word SUM to the correct value on the number line.

Mathematics

2 answers:

Triss [41]3 years ago

8 0

Answer:

Place "SUM" at 4 on the number line.

Step-by-step explanation:

8 + (-4) = 8 - 4 = 4

Adding a negative number is the same as subtracting its opposite. Adding -4 is the same as subtracting 4.

BartSMP [9]3 years ago

4 0

Answer:

The answer is 4.

Step-by-step explanation:

Given problem,

8 + (-4)

Since, in the number line the numbers left to zero are negative and right to zero are positive,

When, we move towards a negative number then we move left side while when we move towards a positive number then we move right side,

Thus, the steps involve in the given problem are follow,

Step 1 : Find 8 on the number line,

Step : we have -4, means we need to move left side 4 unit from 8,

Step 3 : the final position is 4.

Hence, 8 + (-4) = 4

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Henry found some pants on sale for 60% off. If the pants were originally $100, how much are they now?

vredina [299]

If something is 60% off, that means it is now going to be 40% of its original price because

100 - 60 = 40

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40% is 40/100 which as a decimal is 0.4

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The pants will be 40 dollars.

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2 years ago

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The graph of a function h is shown below find h(2).

Fantom [35]

Answer:

i cant really see it but i think the answer is 5

Step-by-step explanation:

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2 years ago

Solve please I do not understand at all and please show work!

lina2011 [118]

So the recipe calls for 96 grams of sugar, and one cup is 128 grams of sugar.

She added a half of a cup, and as they said before one cup was 128 grams of sugar. So half of 128 is 64. So she added 64 grams of sugar. The recipe needs 96 grams so 64 grams is not enough sugar.

So 96 grams minus 64 equals 32 grams. So she still needs 32 grams of sugar.

So since the answers are all in cups, we must convert our answer from grams to cups.

So we have 32 grams of sugar left and to convert it we must put the 32 grams out of one cup. Once again one cup is 128 grams of sugar. So the amount of cups we need is 32/128 (fraction).

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8 0

3 years ago

Geometry math question no Guessing and Please show work thank you

Daniel [21]

Hello!

Each minute on a clock or watch is 6°, as you divide 360° by 60 minutes. As you can see, 32 minutes elapsed during the class. Therefore we just multiply.

32(6)=192

Therefore, our answer is B) 192.

I hope this helps!

5 0

3 years ago

A manufacturer produces light bulbs that have a mean life of at least 500 hours when the production process is working properly.

denpristay [2]

Answer:

We conclude that the population mean light bulb life is at least 500 hours at the significance level of 0.01.

Step-by-step explanation:

We are given that a manufacturer produces light bulbs that have a mean life of at least 500 hours when the production process is working properly. The population standard deviation is 50 hours and the light bulb life is normally distributed.

You select a sample of 100 light bulbs and find mean bulb life is 490 hours.

Let $\mu$ = population mean light bulb life.

So, Null Hypothesis, $H_0$ : $\mu \geq$ 500 hours {means that the population mean light bulb life is at least 500 hours}

Alternate Hypothesis, $H_A$ : $\mu$ < 500 hours {means that the population mean light bulb life is below 500 hours}

The test statistics that would be used here One-sample z test statistics as we know about the population standard deviation;

T.S. = $\frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }$ ~ N(0,1)

where, $\bar X$ = sample mean bulb life = 490 hours

σ = population standard deviation = 50 hours

n = sample of light bulbs = 100

So, the test statistics = $\frac{490-500}{\frac{50}{\sqrt{100} } }$

= -2

The value of z test statistics is -2.

Now, at 0.01 significance level the z table gives critical value of -2.33 for left-tailed test.

Since our test statistic is higher than the critical value of z as -2 > -2.33, 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 the population mean light bulb life is at least 500 hours.

7 0

3 years ago