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Rus_ich [418]
2 years ago
10

Pleasee pleaseee help me so I can not get in trouble because my grades

Mathematics
2 answers:
liraira [26]2 years ago
6 0

Answer:

she has 40 times as many

Step-by-step explanation:

Korolek [52]2 years ago
5 0

Answer: 20

Step-by-step explanation:

80/4= 20

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Plz help me with this math and also explain
jasenka [17]

Step-by-step explanation:

<h2>[1]</h2>

  • SI = $250
  • Rate (R) = 12\sf \dfrac{1}{2} %
  • Time (t) = 4 years

\longrightarrow \tt { SI = \dfrac{PRT}{100} } \\

\longrightarrow \tt { 250 = \dfrac{P \times 12\cfrac{1}{2} \times 4}{100} } \\

\longrightarrow \tt { 250 = \dfrac{P \times \cfrac{25}{2} \times 4}{100} } \\

\longrightarrow \tt { 250 = \dfrac{P \times 25 \times 2}{100} } \\

\longrightarrow \tt { 250 = \dfrac{P \times 50}{100} } \\

\longrightarrow \tt { 250 \times 100 = P \times 50} \\

\longrightarrow \tt { 25000 = P \times 50} \\

\longrightarrow \tt { \dfrac{25000}{50} = P } \\

\longrightarrow \underline{\boxed{ \green{ \tt { \$ \; 500 = P }}}} \\

Therefore principal is $500.

<h2>__________________</h2>

<h2>[2]</h2>

  • 2/7 of the balls are red.
  • 3/5 of the balls are blue.
  • Rest are yellow.
  • Number of yellow balls = 36

Let the total number of balls be x.

→ Red balls + Blue balls + Yellow balls = Total number of balls

\longrightarrow \tt{ \dfrac{2}{7}x + \dfrac{3}{5}x + 36 = x} \\

\longrightarrow \tt{ \dfrac{10x + 21x + 1260}{35} = x} \\

\longrightarrow \tt{ \dfrac{31x + 1260}{35} = x} \\

\longrightarrow \tt{ 31x + 1260= 35x} \\

\longrightarrow \tt{ 1260= 35x-31x} \\

\longrightarrow \tt{ 1260= 4x} \\

\longrightarrow \tt{ \dfrac{1260 }{4}= x} \\

\longrightarrow \underline{\boxed{  \tt { 315 = x }}} \\

Total number of balls is 315.

A/Q,

3/5 of the balls are blue.

\longrightarrow \tt{ Balls_{(Blue)} =\dfrac{3 }{5}x} \\

\longrightarrow \tt{ Balls_{(Blue)} =\dfrac{3 }{5}(315)} \\

\longrightarrow \tt{ Balls_{(Blue)} = 3(63)} \\

\longrightarrow \underline{\boxed{ \green {\tt { Balls_{(Blue)} = 189 }}}} \\

8 0
3 years ago
Find the mean. Round to the nearest tenth if necessary.
kondor19780726 [428]

Answer:

27

Step-by-step explanation:

The actual mean is 27.008333333333, round that as you will.

5 0
2 years ago
Read 2 more answers
Please help me with this sum​
dimulka [17.4K]

Answer:

3950÷5=790 (790×5=3950)

1914÷6=319 (319×6=1914)

give a try for next sums

5 0
2 years ago
identify the type of sampling used​ (random, systematic,​ convenience, stratified, or cluster​ sampling) in the situation descri
sertanlavr [38]

Answer: Random sampling

Step-by-step explanation:

  • A random sampling technique is a method of sampling in which each member for the sample is chosen randomly from the population.
  • Systematic sampling :  It is a kind of random sampling in which the members get selected after a fixed interval but a random starting point.
  • Convenience sampling : It is a kind of random sampling in which the members get selected on the basis of researchers convenience.
  • Stratified sampling :  It is a kind of random sampling in which the entire population is divided into a finite number of strata , the researcher select members for sample from each strata.
  • Cluster sampling : It is a kind of random sampling in which the entire population is divided into clusters. Then a random sample of cluster is drawn by researcher.

In the given situation , 784 adults are selected after their telephone numbers were randomly generated by a​ computer.

Therefore , the  type of sampling used​ here is :  random sampling

7 0
3 years ago
Let f(x)=2x-1 and g(x)=x^2 -3. Find (f o g)(-3)
anzhelika [568]
(f o g)(-3) = (f(g(-3))
Because g is on the inside, we carry out g first.

g(x) = x^2 - 3
Substitute -3 in for x.
g(-3) = (-3)^2 - 3 = 9 - 3 = 6
g(-3) = 6

Next, carry out f on the result of g(-3)
f(6) = 2(6) - 1
      = 12 - 1
      = 11
So the answer is 11.

6 0
3 years ago
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