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3 years ago

3 pencils sell for $0.99, How much would 7 pencils cost.

Mathematics

2 answers:

insens350 [35]3 years ago

4 0

Answer:

2.31

Step-by-step explanation:

Thisis because when you have o figure the unit rate which is found by doing 0.99/3 or to remember the formula cost/total number of whatever than you get 0.33 is unit cost for one no multiply that by 7

Volgvan3 years ago

4 0

Answer:

$2.31

Step-by-step explanation:

$099/3=$0.33

$0.33x7=$2.31

$2.31

Start out by finding the unit rate and then multiply it by 7.

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What is the slope of the line that passes through (-2, 7) and (4, 9)?

Bond [772]

$\bf (\stackrel{x_1}{-2}~,~\stackrel{y_1}{7})\qquad (\stackrel{x_2}{4}~,~\stackrel{y_2}{9}) \\\\\\ slope = m\implies \cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{9-7}{4-(-2)}\implies \cfrac{9-7}{4+2}\implies \cfrac{2}{6}\implies \cfrac{1}{3}$

7 0

3 years ago

Read 2 more answers

A rectangle has length 127.3 cm and width 86.5 cm, both correct to 1 decimal place. Calculate the upperbound and the lowerbound

Mnenie [13.5K]

Answer:

Correct to 1dp

127.3 cm = 127.0 cm

86.5 cm = 87.0 cm

Upper limits:

127.0 cm = 127.05 cm

87.0 cm = 87.05 cm

Lower Limits:

127.0 cm = 126.95 cm

87.0 cm = 86.95 cm

upper limit of perimeter of rectangle:

P = 2(l+w)

= 2(127.05 + 87.05)

= 2(214.1)

= 428.2 cm

lower limit of perimeter of rectangle:

P = 2(l+w)

= 2(126.95 + 86.95)

= 2(213.9)

= 427.8 cm

therefore;

$427.8 cm \leqslant perimeter < 428.2cm$

8 0

3 years ago

2sin^(-2490)+tan 1410

givi [52]

2sin²(-2490)+tan 1410=2sin²(-330-6*360)+tan (330+3*360)=
=2sin²(-330)+tan (330)=2 sin²(30-1*360)+tan (-30)=
=2sin²(30)-tan (30)=2(1/2)²-√3/3=1/2-√3/3)=(3-2√3)/6

Answer: 2 sin²(-2490)+tan (1410)=(3-2√3)/6 (≈-0.07735...)

7 0

3 years ago

|x+11| =−1<br> plz help show steps 2

dezoksy [38]

Answer:

No solutions. You can’t have a negative absolute value.

3 0

3 years ago

I have no clue what the answer is

spin [16.1K]

Answer:

Second option is the correct answer.

Step-by-step explanation:

$\frac{2}{3} x - 5 > 3 \\ \\ \frac{2}{3} x > 5 + 3\\ \\ \frac{2}{3} x > 8 \\ \\ x > 8 \times \frac{3}{2} \\ \\ x > 12$

7 0

2 years ago