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3 years ago

-6 + (-5) + 7 what do I need to do first?

Mathematics

2 answers:

Snowcat [4.5K]3 years ago

3 0

Add the negative numbers.

Diano4ka-milaya [45]3 years ago

3 0

-6 + (-5) +7

just add from left to right:

1st step:

-6 + (-5) = -11

2nd step:

-11 +7 = -4

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bixtya [17]

Answer:

12 inches

Step-by-step explanation:

Set up an equation:

Variable x = height of the scale model

3/18 = x/72

Cross multiply:

3 × 72 = 18 × x

216 = 18x

Divide both sides by 18:

4 0

3 years ago

Number of Text Messages a Day A random sample of n = 755 US cell phone users age 18 and older in May 2011 found that the average

Alexeev081 [22]

Answer:

The 95% confidence interval is (29.54 - 53.46}

Step-by-step explanation:

given data:

$\hat X = 41.5$

Se = 6.1

n = 755

a) best estimate $\hat x = 41.5$

b) at 95% confidence interval

$\alpha = 1- 0.95 = 0.05$

$\alpha /2 = 0.025$

$z_{\alpha/2} = z_{0.025} = 1.96$

at 95% confidence interval for [/tex]\mu[/tex]

$\hat x \pm z_{\alpha /2} \times Se$

$41.5 \pm 1.96\times 6.1$

$41.5 \pm 11.96$

The 95% confidence interval is (29.54 - 53.46}

7 0

3 years ago

Which number is the additive inverse of 47? Hi. SI56 -47 1 W om 04

Anvisha [2.4K]

Answer:

4 $\frac{1}{4}$

Step-by-step explanation:

The additive inverse is the value that must be added to the number to give zero.

- 4 $\frac{1}{4}$ + 4 $\frac{1}{4}$ = 0

↑ additive inverse

5 0

3 years ago

Sergeu [11.5K]

Answer:

$9C=5(F-32)$

Step-by-step explanation:

The equation which can convert the temperature from degree Celsius into degree Fahrenheit is given as under

$9C=5(F-32)$

We can solve it further for F as

$9C=5F-5 \times 32$

$9C=5F-160$

$9C+160=5F$

Dividing both sides by 5 we get

$\frac{9C}{5}+32=F$

$F=\frac{9C}{5}+32$

Now substituting values of C in this equation will give us the corresponding values of F

Ex : C=1

$F=\frac{ 9\times 1}{5}+32$

$F=\frac{ 9+160}{5}$

$F=\frac{ 169}{5}$

Hence 1 degree Celsius is $\frac{ 169}{5}$ degree Fahrenheit

4 0

3 years ago

logan mader 4 stacks of wooden blocks, the first tackswas 6 blocks tall,the second stacks was 2 blocks taller than the first, th

Arada [10]

6+8+6+16= b)36 blocks

4 0

4 years ago