Mathematics, 30.07.2019 06:00 gokusupersaiyan12345

Mrs. hernandez bought 18 pens for her class. highlighters cost $3 each, and gel pens cost $2.50 each. she spent a total of $50. use a system of equations to find the number of highlighters and gel pens mrs. hernandez bought.

Answers: 2

Show answers

Answers

The linear equation in two variables can be solved by various methods, the common method to solve it is the substitution method. The number of highlighters is 10 and gel pens are 8 bought by Mrs. Hernandez.

Mrs. Hernandez bought 18 pens for her class.

The cost of one highlighter is $3.

The cost of one pen is $2.50.

She spent a total of $50.

We need to find the number of highlighters and gel pens bought by Mrs. Hernandez.

Let us assume the number of highlighters bought by her is x and the number of pens bought by her is y.

The total cost of the pen and highlighter given in the question is $50.

Therefore,

3x+2.5y=50 ......(1)

The total number of highlighters and pens is 18.

Thus,

x+y=18 .....(2)

By solving the equations, we get.

$x=10\\y=8$

The number of highlighters is 10 and gel pens are 8 bought by Mrs. Hernandez.

To know more about the system of equations, please refer to the link:

link

Mrs. hernandez bought 18 pens for her class. highlighters cost $3 each, and gel pens cost $2.50 each

Answer from: nhu78

$10\ highlighters\\8\ gel\ pens$

Step-by-step explanation:

Let

x------> the number of highlighters

y-----> the number of gel pens

we know that

x+y=18 ------> equation A

3x+2.5y=50 ------> equation B

The intersection point both graphs is the solution of the system of equations

using a graphing tool

The intersection point is (10,8)

see the attached figure

therefore

$x=10\ highlighters\\y=8\ gel\ pens$

Answer from: Quest

answer is

c) 4

step-by-step explanation:

Asap 25 pts + brainliest to right/best answer

Answer from: Quest

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

= $\sqrt{(9-6)^{2} +(12-6)^{2} } \\=\sqrt(45)=3\sqrt(5)$

side j'k'=distance between j' and k'

= $\sqrt{(3-2)^{2} +(2-4)^{2} } \\=sqrt(5)$

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl

Another question on Mathematics

Mathematics, 21.06.2019 17:30

Select the correct answer from the drop-down menu. subtracting 3xy^2 from 8xy^2 gives the same result as the expression. [tex]3xy ^{2} - 8xy ^{2} [/tex][tex] { - 7xy}^{2} - {2xy}^{2} [/tex][tex] {7xy}^{2} - {2xy}^{2} [/tex]

Answers: 3

Answer

Mathematics, 21.06.2019 18:20

Do social recommendations increase ad effectiveness? a study of online video viewers compared viewers who arrived at an advertising video for a particular brand by following a social media recommendation link to viewers who arrived at the same video by web browsing. data were collected on whether the viewer could correctly recall the brand being advertised after seeing the video. the results are given below.correctly recalled the brandarrival 409153browsing20484b. conduct the hypothesis test, using the 0.025 level of significance.what is the value of the test statistic? χ2stat=what is the p-value? p-value=is this value significant atα=0.025?

Answers: 2

Answer

Mathematics, 21.06.2019 20:10

In the diagram, the ratios of two pairs of corresponding sides are equal to prove that almn - axyz by the sas similarity theorem, it also needs to be shown that x 6 z un z zz un = 2x zləzz lezy

Answers: 1

Answer

Mathematics, 22.06.2019 00:20

Once george got to know adam, they found that they really liked each other. this is an example of what factor in friendship

Answers: 1

Answer

You know the right answer?

Mrs. hernandez bought 18 pens for her class. highlighters cost $3 each, and gel pens cost $2.50 each...

Questions