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4 years ago

If the distance from 0 to x on a number line is greater than 0, then -2 + x is positive. True or false

1 answer:

7 0

This is false. Let's test it.

So let's say that x is 2.
The statement is:
-2 + x is positive
-2 + 2 is positive
0 is positive
This is not correct

Let's say that x is -2
-2 + x is positive
-2 + (-2) is positive
-2 - 2 is positive
-4 is positive

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Four times an angle is equal to half of its supplement. Find the measures of both angles.

denis-greek [22]

Answer:

The bigger angle is 144 degrees and the smaller one is 36 degrees

4 0

3 years ago

is the relationship between the amount of the orange juice concentrate c and the amount of water w proportional? Explain. Zoe us

cluponka [151]

Answer:

B.12 ounces

Step-by-step explanation:

step 1

Find out the ounces of orange juice concentrate used yesterday

Let

x ----> ounces of orange juice concentrate used yesterday

y ---> ounces of water used yesterday

we know

that

----> equation A

----> equation B

substitute equation B in equation A

solve for x

step 2

today she wants to make twice as much orange juice.

To find out how much orange juice concentrate she needs, multiply the ounces of orange juice concentrate used yesterday by 2

3 0

3 years ago

Read 2 more answers

Find the slope of the line that passes through (-2, 5) and (-2, 1).<br> m=5-1/-2-2/=4/-4= -1

Inessa05 [86]

Answer:

(1-5)/(-2+2)= -4/0 is undefined

4 0

3 years ago

A lab is testing the amount of a certain active chemical compound in a particular drug that has been recently developed. The man

Mazyrski [523]

Answer:

The 95% confidence interval is "87.94, 91.86".

Step-by-step explanation:

The given values are:

Sample batches,

n = 25

Sample mean concentration,

$\bar{x}$ = 89.9 mg

Amount of chemical,

σ = 5

α = 0.05

The critical value from Z table will be:

= $Z(\frac{\alpha}{2} )$

= $Z(\frac{0.05}{2} )$

= $1.96$

Now,

The confidence interval will be:

= $\bar{x} \pm Z(\frac{\alpha}{2} )\times \frac{\sigma}{\sqrt{n} }$

On substituting the values, we get

= $89.9 \pm Z(\frac{0.05}{2})\times \frac{5}{\sqrt{25}}$

= $89.9 \pm Z(\frac{0.05}{2})\times \frac{5}{5}$

= $89.9 \pm1.96\times 1$

Lower limit will be:

= $89.9 -1.96\times 1$

= $87.94$

Upper limit will be:

= $89.9 +1.96\times 1$

= $91.86$

7 0

3 years ago

The table shows the number of degrees the temperature increased or decreased over four days. On which day did the temperature ch

Luba_88 [7]

The correct answer is Friday

6 0

3 years ago

Read 2 more answers