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3 years ago

Maria has c boxes of 10 pencils. The teacher gives her another 20 pencils. How many pencils does she have altogether?

Mathematics

2 answers:

pishuonlain [190]3 years ago

8 0

10c+20

Hope this helps :)

o-na [289]3 years ago

4 0

The equation to your question would be P =10(c)+20. meaning 10 pencils in each box multiplied by the number of boxes (c) plus the 20 pencils the teacher gives her will equal the number of pencils (P) she has altogether. (C stands for the number of boxes and P stands for pencils)

so lets say she has 3 boxes. well, c stands for boxes soooo...... all you have to do is plug in 3 were c is. giving you this equation P = 10(3)+20. then all you have to do is solve. P = 10(3)+20
10 times 3 = 30 so P = 30+20
then add 30 and 20 P = 50 she has 50 pencils altogether

(remember this is just an example, 50 pencils is NOT the answer to your question. but you can use the equation i gave you to find your own answer!) :) Hope this helps!!

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Partitioning- finding the endpoint

ElenaW [278]

Values of x and y will be 12 and 5 respectively.

It's given in the question,

Three points Q, R and S are collinear.
Coordinates of Q → (2, 0)
Coordinates of R → (8, 3)
Coordinates of S → (x, y)
QR : RS = 3 : 2

Since, expression for the coordinates of a point (h, k) which divides the segment joining points $(x_1,y_1)$ and $(x_2,y_2)$ in the ratio of m : n is given by,

h = $\frac{mx_2+nx_1}{m+n}$

k = $\frac{my_2+my_1}{m+n}$

Since, R is a point on segment QS dividing in the ratio of 3 : 2, coordinates of R will be,

$8=\frac{3x+2\times 2}{3+2}$

$8=\frac{3x+4}{5}$

$3x+4=40$

$3x=36$

$x=12$

Similarly, $3=\frac{3y+2\times 0}{3+2}$

$3=\frac{3y}{5}$

$3y=15$

$y=5$

Therefore, values of x and y will be 12 and 5 respectively.

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brainly.com/question/8061114

5 0

3 years ago

Help with 1 and 3 please........

77julia77 [94]

Answer:

P = 9+9+14+14= 46cm

A = Base (14 cm) × Height (7cm)

14×7= 98 cm²

3. P= 1.2 +2.0 +1.6= 4.6m

A = 1/2 B×H

= 1/2 1.6× 1.2

= 0.96 m²

5 0

3 years ago

What is the answer, i tried everything but i can’t seem to get the right answer

ValentinkaMS [17]

Answer:A

Step-by-step explanation: It never talks about 50 so i don't know why that is there so I think it is A because 21 dollars is more than 5+2.75, (not 100% sure but at least 85% sure)

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steposvetlana [31]

Answer:

8.3

Step-by-step explanation:

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3 years ago

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What is the value of the function y=3r−1 when R = -1 −8 −4 2 6

garik1379 [7]

If these are all separate answers, then: y=3r-1

Substitute r for the value it's asking for.

R=-1
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(Answer) y=-4

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(Answer) y=-13

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I hope this helps. Apologies if you're looking for something else.

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4 years ago