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2 years ago

How do you estimate the sum of 198,260+31,900?

Mathematics

1 answer:

Vesnalui [34]2 years ago

4 0

To estimate an amount to the tenth we have 3 steps to follow: ...

STEP 2: We add the rounded numbers. ...

STEP 1: Round the summands.

STEP 2: Add the rounded numbers.

STEP 3: Look at the total amount of rounding.

We have rounded the two summands down.

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A construction worker is sent to the store to buy more than 30 lb of roofing nails. The nails are sold in 5 lb boxes and 10 lb b

trapecia [35]

Answer:

The answer is A: 5x + 10y > 30. That is, the combination of boxes must be greater than 30 since the requirement is to have more than 30 lb of nails.

Step-by-step explanation:

The worker can buy a combination of boxes, as long as the total is greater than 30 lb. Multiply 5 lb by x and add that to 10 lb times y to get the total, which must exceed 30 lb.

8 0

2 years ago

Determine the value of x. 30° 45° 20° 60°

barxatty [35]

Answer:

x=30

Step-by-step explanation:

x+2x+3x=180

6x=180

x=180/6=30

7 0

3 years ago

Two cars leave town at the same time going in the same direction. One travels 55 miles per hour and the other travels 48 miles p

Amanda [17]

Answer:

Question 160644: Two cars leave town at the same time going in opposite directions. One travels 55 mph and the other travels 48 mph. In how many hours will they be 206 miles apart? T=2 HOURS THEY WILL BE 206 MILES APART

Ok thank you

4 0

2 years ago

Read 2 more answers

Compute: (3.5· 2/7 − 2/3 )÷16

velikii [3]

Answer:

≅ 0.02083333

Step-by-step explanation:

(3.5 * 2/7 - 2/3)÷16 = 1

≅ 0.02083333

1: Conversion a decimal number to a fraction: 3.5

2: Multiple: 3.5 * 2

= 7 · 2

2 · 7

= 14

= 1 · 14

1 · 14

= 1

3: Subtract:

4: Divide

<em><u>Hope this helps.</u></em>

7 0

3 years ago

HELP ASAP TIMED !!!! What is the exact value of cos(c + d), given Sine c = StartFraction 24 Over 25 EndFraction for c in Quadran

Keith_Richards [23]

9514 1404 393

Answer:

Step-by-step explanation:

In the second quadrant, ...

c = 180° -arcsin(24/25) ≈ 106.26°

In the third quadrant, ...

d = 360° -arccos(-3/4) ≈ 221.41°

Then cos(c+d) = cos(327.67°) ≈ 0.84498

This is a positive irrational number, greater than 21/100, so the only reasonable choice is the last one:

$\dfrac{21+24\sqrt{7}}{100}\approx 0.84498$

_____

Perhaps you want to work this out using the trig identities.

cos(c) = -√(1 -sin(c)²) = -7/25

sin(d) = -√(1 -cos(d)²) = -(√7)/4

Then the desired cosine is ...

cos(c+d) = cos(c)cos(d) -sin(c)sin(d)

cos(c+d) = (-7/25)(-3/4) -(24/25)(-√7/4)

cos(c+d) = (21 +24√7)/100 . . . . matches choice D

8 0

2 years ago