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3 years ago

Describe the steps when adding the following number sentence: -45 + 10 + (-20) + 20

Mathematics

1 answer:

Whitepunk [10]3 years ago

4 0

Answer:

Lets break it you add -45 to 10 and get -35 then you add -20 to 20 making 0 so the answer is -35

Step-by-step explanation:

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Write a number that changes to 122,000 when it is rounded. To what place was your number rounded

11111nata11111 [884]

121,940

My answer was rounded to the nearest thousandth

3 0

4 years ago

Find the measures of all four angles if 3·(m∠1+m∠3) = m∠2+m∠4.

mixas84 [53]

Answer:

Step-by-step explanation:

m∠1=m∠3

m∠2=m∠4

3*(m∠1+m∠3)=m∠2+m∠4

3*(m∠1+m∠1)=m∠2+m∠2

3×2 m∠1=2 m∠2

m∠2=3 m∠1

now m∠1+m∠2=180°

m∠1+3 m ∠1=180

4 m∠1=180

m∠1=180/4=45°

m∠3=45°

m∠2=180-m∠1=180-45=135°

m∠4=135°

5 0

3 years ago

Rita sells beaded necklaces. Each large necklace sells for $5.40 and each small necklace sells for $5.10 . How much will she ear

ziro4ka [17]

Answer:

$42.90

Step-by-step explanation:

to find how much money selling the large necklaces multiply the amount and how many were sold

5.40*7

$37.80

add the money from the one small necklace that was sold

37.80+5.10

$42.90

6 0

4 years ago

Solve for X <br><br>Explain if possible :)

sweet-ann [11.9K]

The two labeled angles are alternate interior angles, and as such, they are the same.

From this result you can build the equation

$15x-2 = 13x+2$

and solve it for x: subtract 13x from both sides to get

$2x-2=2$

and add 2 to both sides to get

$2x = 4 \implies x = 2$

Check: if we plug the value we found we have

$13\cdot 2 + 2 = 26+2 = 28 = 15\cdot 2 - 2 = 30-2$

So the angles are actually the same, as requested.

4 0

3 years ago

an electrician has $120 to spend on interior light fixtures. The wholesale price for a 13-watt low-energy lamp is $4. The price

JulsSmile [24]

X = low-energy lamp
y = high-energy lamp

1) 4x + 5y

2) 120= 4x + 5y

8 0

3 years ago

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