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3 years ago

HELP ASAP!!! WILL MARK BRAINLIEST!!!

Mathematics

2 answers:

scoundrel [369]3 years ago

8 0

your answer is B the second one!

enot [183]3 years ago

7 0

Answer:

Step-by-step explanation:

First we need to specify that the equation given is wrong, it's misspelled, because that equation doesn't have solutions in the Real Numbers.

So, the equation must be expressed like this:

$\frac{2z+6}{z} +2=\frac{3-1}{z}$

Now, we solve for <em>z:</em>

$\frac{2z+6+2z}{z} =\frac{2}{z}\\ 4z+6=2\\4z=2-6\\4z=-4\\z=\frac{-4}{4} \\z=-1$

<em />

<em>Therefore, the solution set of the equation is the last one.</em>

PD: It's very important to write properly the equations give, otherwise all procedure would be wrong.

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Rose works eight hours a day for five days a week. how many hours will she work in six weeks ?

Kryger [21]

Start by multiplying 8 and 5 to get the hours worked each week.
Next multiply that by 6 to get how many hours she'll work in 6 weeks.

7 0

3 years ago

Read 2 more answers

In how many ways can 6 competitors finish a race assuming there are no ties?In how many ways can we sit n people on r < n cha

VLD [36.1K]

Answer: a) 720, b) $^nC_r=\dfrac{n!}{(n-r)!r!}$ c) 336, d) 30240 e) 120.

Step-by-step explanation:

Since we have given that

a) Number of competitors = 6

We need to find the number of ways that 6 competitors can finish a race and there are no ties.

So, Number of ways would be

$6!=720$

b) number of people = n

Number of chairs = r (r<n)

so, the number of ways we can sit n people on r<n chairs is given by

$^nC_r=\dfrac{n!}{(n-r)!r!}$

c) If there are three awards :

Gold, silver, bronze.

We need to find the number of ways that these medals can be awarded.

Number of ways is given by

$^8P_3\\\\=336$

d) Number of 5-digit zip codes are possible is given by

$^{10}P_5=30240$

e) Number of poeple = 10

Number of people required in committee = 3

Number of different 3 person committee that are selected from 10 people is given by

$^{10}C_3=120$

Hence, a) 720, b) $^nC_r=\dfrac{n!}{(n-r)!r!}$ c) 336, d) 30240 e) 120.

6 0

3 years ago

Help if you can please

Gennadij [26K]

Answer:

10 coconut cupcakes

Step-by-step explanation: so, here is what we do since there is 8 cupcakes sold and 4 of them are coconut cupcakes we divide. this is hard to explain but we know that 8 divided by 4 is 2 so we have to multiply to 20 so like 2 times 10 which gives us 20. then we use the answer that we got from multiplying which is 10 as our answer if that makes sense.

6 0

2 years ago

IM IN DESPERATE NEED FOR HELP SOMEONE HURRRRYYY

LenaWriter [7]

Answer:

yes, triangle DEF is similar to triangle DBC, BC corresponds to EF, and angle DCB corresponds to angle F.

Step-by-step explanation:

Part A: Angle D is congruent to angle D by the reflexive property. Since line BC is parallel to line EF then angle DCB = angle DFE by corresponding angles. Hence triangle DEF is similar to triangle DBS by the AA Similarity Postulate.

Part B: BC corresponds to EF because they are in the same order and the triangles listed DEF and DBC

Part C: Angle DCB corresponds to angle F since they are corresponding angles with the two given parallel lines BC and EF.

3 0

3 years ago

a swimming pool 25m by 10m has a concrete border all round. Find the area of the concrete border if it is 2.5m wide at the sides

Ksju [112]

So from what I understand, you would multiply 10m by 5m for the width to get 50m squared, and multiply the 50 by 2 to get 100m for both sides of the width for the pool. Next the length. Multiply 25m by 2.5m to get 62.5m squared. Once again, mutiply it by 2 for both side lengths of the pool to get 125m. Last, add 125m and 100m to get 225m for the concrete border of the pool.

7 0

3 years ago