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3 years ago

10. Doug has added two decimal numbers. His work is shown.

Mathematics

1 answer:

RSB [31]3 years ago

8 0

Doug didn’t line up the decimals, so his answer would be incorrect. His answer should be 20.45

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The ratio of girls to boys in a a swimming club was 2 : 4. There were 14 girls. How many total members were there in the club?

Mariulka [41]

Answer:

42 people

Step-by-step explanation:

If the girls to boys 2:4, and there are 14 that means it is times 7. 4 times 7 = 28.

14 + 28 is 42.

7 0

3 years ago

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Scott made 3 identical necklaces, each having beads and a pendant. The total cost of the beads and pendants for all 3 necklaces

pantera1 [17]

Answer:

$2.90

Step-by-step explanation:

<u>Lets look at the information given:</u>

Scott made 3 necklaces

$14.40 is the cost for both the beads and pendants for all 3 necklaces

$5.70 was the cost of just beads for all 3 necklaces

Each necklace has 1 pendant

The first step to solving this equation is subtracting the cost of the beads from the total cost for the necklaces:

$14.40 - $5.70= $8.70

Now we know that cost for the 3 pendants for all 3 necklaces was $8.70, but we need to find how much EACH pendant costs. To find out, we simply divide the total cost for all 3 pendants by 3:

$8.70 ÷ 3 = $2.90

So each pendent costs $2.90

6 0

3 years ago

How long will it take to reach a town 250 miles a way if you drive 50 miles per hour?

nirvana33 [79]

It will take 5 hours.

4 0

3 years ago

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perry thinks that 1/2 and 2/4 are equivalent fractions. but when he draws the number lines to the right he sees that 1/2 and 2/4

Misha Larkins [42]

He is correct but he might be doughting him self

6 0

4 years ago

Please help quickly for 5 stars and brainliest!!

alexandr402 [8]

1.
Height h = 240 feet
We insert it into formula.
$240 = -16 t^{2} +128t$
Now we solve this for t:
$16 t^{2} -128t +240 = 0 /16 \\ t^{2} - 8t +15 =0 \\ t_{1} = 5 t_{2} = 3$

We have two answers as the rocket will pass this height on it's way up and down.

2.
Height h = 0 feet
We insert it into formula.
$0=-16 t^{2} +76t + 2$
Now we solve this for t:
$16 t^{2} - 76t -2 = 0 /2 \\ 8t^{2} - 38t - 1 = 0 \\ t_{1} = 5 t_{2} = -1$
We do not consider solution -1 as the time can not be negative. Our solution is 5s.

3.
Height at bottom of hill h = 0 feet
We insert it into formula.
$v^{2} = 64 * 0 = 0 ft/s$

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4 years ago