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Fittoniya [83]
3 years ago
5

URGENT!!!The number of questions on a math test is represented (3x+1). The number of questions on a spelling test is represented

by (x+12). Write an expression to find how many more questions were on the math test. Then evaluate the expression if the value of x is 8.
Mathematics
1 answer:
timama [110]3 years ago
7 0
(3x+1)-(x+12)

(24+1)- 20

25-20=5

5 more questions
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A pair of shoes has an original price of $65 but is on sale for a 20 percent discount. What number can you multiply by $65 to ge
Contact [7]

Answer:

0.8

Step-by-step explanation:

20 / 100 = 0.2

1 - 0.2 = 0.8

5 0
3 years ago
Read 2 more answers
Divide 9y power 2 by 3<br><br>divide (8x power 2 +4x ) by 2x​
olchik [2.2K]

Answer:

1=27

2=34

Step-by-step explanation:

1)9y power 2÷3

or, y=9 power 2÷3

or, y=9×9÷3

or, y=81÷3

or, y=27

2) (8x power 2+4x)÷2

=(8x×8+4x)÷2

=(64x+4x)÷2

=68x÷2

or, x=68÷2

or, x=34

4 0
3 years ago
Ethan writes 2/3 of a page in 5/12 of a minute. How much time does it take him to write one page
Nataliya [291]
2/3 of a page in 5/12 of a minute

Multiply both fractions by 3/2

\frac{2}{3} \times \frac{3}{2} = 1

\frac{5}{12} \times \frac{3}{2} = \frac{5}{4} \times \frac{1}{2}=\frac{5}{8}

So, Ethan can read 1 page in 5/8 of a minute.
8 0
3 years ago
3. Suppose the mystery bag had resulted in the following number of red chips. Using the simulated sampling distributions found e
Vinvika [58]

Answer:

a) 0.172

b) 0.167

c) 0.1404

Step-by-step explanation:

Margin of error, E = 2\times\sqrt{\frac{p(1-p)}{n}}

here,

p = probability of the event

n = sample size

a) n = 30

p = 10 ÷ 30 = 0.333

Therefore,

E = 2\times\sqrt{\frac{0.333(1-0.333)}{30}}

= 2 × 0.0861

= 0.172

b)  n = 30

p = 21 ÷ 30 = 0.7

Therefore,

E = 2\times\sqrt{\frac{0.7(1-0.7)}{30}}

= 2 × 0.0836

= 0.167

c) n = 30

p = 22 ÷ 50 = 0.44

Therefore,

E = 2\times\sqrt{\frac{0.44(1-0.44)}{50}}

= 2 × 0.0702

= 0.1404

3 0
3 years ago
9 11/12- 2 8/11 is a problem that i need help on
Vitek1552 [10]
Hey there!!

Okay here are the steps you can follow!

9 11/12  ---->  improper fraction  ----> 119/12
2 8/11  ---->  improper fraction  ---->  30/11

119/12  -  30/11
(119/12  -  30/11) * 132
11(119)  -  12(30)
1309 - 360
<u>949</u>
3 0
3 years ago
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