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e-lub [12.9K]
2 years ago
8

Need help math test pleaseeeee

Mathematics
1 answer:
marishachu [46]2 years ago
3 0
A,C, and D! x factors should always have a number next to them to show through tape diagrams , those without them are automatically eliminated , the rest have number answers and are correct
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Joanna went school supply shopping. She spent $30.70 on notebooks and pencils. Notebooks cost $2.20 each and pencils cost $1.09
aleksandrvk [35]

Ok, so we need to set up a system of equations.

x + y = 19, where x is notebooks and y is pencils

2.2x + 1.09y = 30.70. You use the coefficient for individual prices and the total for the total given.

2.2x + 2.2y = 41.8  (multiply for elimination later)

2.2x + 1.09y = 30.7

1.11y = 11.1

y = 11.1/1.11

y = 10

Now we use the substitution method in x + y = 19

x + 10 = 19

x = 9

9 notebooks and 10 pencils


8 0
3 years ago
Help plz. Brainlest and 5 stars and thanks if right :)
yuradex [85]

Answer:

c

Step-by-step explanation:

just look at 11 1/4, which is equals to 11 2/8. she recorded 3, and c is the only one which corresponds :) lmk if im wrong tho, the picture is kind of blurry

4 0
2 years ago
Dave is making a large rectangular block of black stone on a moon of Jupiter. He has 25 tons of stone with him. However, he need
Tasya [4]

Answer:

Step-by-step explanation:

He has 25 tons of stone with him initially. Since he needs to repay two loans, one of 6 tons of stone and another of 4 tons, then the number of tons of stones that he needs to repay as loan is 4 + 6 = 10 tons

The number that he has left is 25 - 10 = 15 tons of stone

Since the company wanted to give him 40 tons but lost 14 tons, the amount that he received is 40 - 14 = 26 tons of stone

Therefore, the number of tons of stone that he will have left to make his block out of is

15 + 26 = 41 tons of stone

7 0
3 years ago
A powerful microscope is used to
prohojiy [21]

Answer:

6.834 x 10^-6 meters

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
9. Deanne works in a shoe factory. She packs
Ksivusya [100]

Answer:

a. 2x+5y=50

b. (25,0), the number of tennis shoes needed to weigh 50 pounds.

c.(0,10), the number of boots needed to weigh 50 pounds.

Step-by-step explanation:

a. Weight times number is what we are looking for to add up to the total weight of the shoes

b. set to y to 0

c.  set x to 0

8 0
2 years ago
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