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3 years ago

6th grade math help me, please :))

Mathematics

1 answer:

Gelneren [198K]3 years ago

5 0

Answer:

$\sf a) \ 2.5\\b) \ 7.5$

Step-by-step explanation:

$\displaystyle \frac{250}{100}$

$\sf Express \ as \ a \ decimal.$

$=2.5$

$\sf Multiply \ 3\% \ with \ 250.$

$\displaystyle 250 \times \frac{3}{100}$

$\displaystyle \frac{750}{100}=7.5$

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What is the slope of the line parallel to the line 9y + 2x = 54? Select one:

Paraphin [41]

Answer:

The slope is -2/9

Step-by-step explanation:

9y + 2x = 54

Solve for y to get the equation in the form

y = mx+b where m is the slope and b is the y intercept

Subtract 2x from each side

9y + 2x -2x = -2x+54

9y = -2x+54

Divide by 9

9y/9 = -2x/9 + 54/9

y = -2/9 x +6

The slope is -2/9

Parallel lines have the same slope

4 0

3 years ago

Can someone help me

Nikolay [14]

Omg this looks hard

4 0

2 years ago

Read 2 more answers

Cidnee is weighing combinations of geometric solids. She found that 4 cylinders and 5 prisms weigh 32 ounces and that 1 cylinder

vitfil [10]

Answer:

The weights of each cylinder and prism are 3 and 4 ounces, respectively.

Step-by-step explanation:

Let be $x$ and $y$ the masses of a cylinder and a prism, measured in ounces, respectively. After a careful reading of the statement we get the following linear equations by interpretation:

i) She found that 4 cylinders and 5 prisms weigh 32 ounces:

$4\cdot x +5\cdot y = 32\,oz$ (Eq. 1)

ii) And that 1 cylinder and 8 prisms weigh 35 ounces:

$x + 8\cdot y = 35\,oz$ (Eq. 2)

Now we solve the system of linear equations algebraically:

From (Eq. 2):

$x = 35 - 8\cdot y$

(Eq. 2) is (Eq. 1):

$4\cdot (35-8\cdot y) + 5\cdot y = 32$

$140-32\cdot y +5\cdot y = 32$

$32\cdot y - 5\cdot y = 140-32$

$27\cdot y = 108$

$y = 4\,oz$

From (Eq. 2):

$x = 35 - 8\cdot (4)$

$x = 35 - 32$

$x = 3\,oz$

The weights of each cylinder and prism are 3 and 4 ounces, respectively.

4 0

2 years ago

Please help. I know it’s not the hardest, but I think I did something wrong when I solved it. Please include your work. Tysm! Pl

Alex73 [517]

1 Multiply both sides by

−

3.2

n−3.2.

0.3

(

−

3.2

)

n+0.3=

(n−3.2)

2 Simplify

(

−

3.2

)

(n−3.2) to

(

−

3.2

)

9(n−3.2)

0.3

(

−

3.2

)

n+0.3=

9(n−3.2)

3 Multiply both sides by

0.6

(

−

3.2

)

2n+0.6=9(n−3.2)

4 Expand.

0.6

−

28.8

2n+0.6=9n−28.8

5 Subtract

2n from both sides.

0.6

−

28.8

−

0.6=9n−28.8−2n

6 Simplify

−

28.8

−

9n−28.8−2n to

−

28.8

7n−28.8.

0.6

−

28.8

0.6=7n−28.8

7 Add

28.8

28.8 to both sides.

0.6

28.8

0.6+28.8=7n

8 Simplify

0.6

28.8

0.6+28.8 to

29.4

29.4.

29.4

29.4=7n

9 Divide both sides by

29.4

10 Simplify

29.4

4.2

4.2.

4.2

4.2=n

11 Switch sides.

4.2

n=4.2

4 0

2 years ago

Read 2 more answers

I know the answer but plz explain it. 5:3 × 6:2

stira [4]

5:3 x 6:2 can also be written as a fraction
5/3 x 6/2
Multiply across
30/6
Simplify
5/1
Rewrite
5:1 is your answer, or if your teacher does not want it simplified, 30:6

Hope I helped! :)

3 0

3 years ago