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3 years ago

HELPPPPPPPPPPPPP asap plz

Mathematics

2 answers:

Aleks04 [339]3 years ago

5 0

The answer is c..........................

malfutka [58]3 years ago

3 0

The answer is c!!!!!!!!!!!!!!!!!!!!!!!!

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I've done the y = equations but I don't know how to do this one.

Tems11 [23]

Consider the equation

$-10x-y=-20$

1) First row of the table

Set x=0 and solve as follows:

$\begin{gathered} -10(0)-y=-20 \\ \Rightarrow-y=-20 \\ \Rightarrow y=20 \end{gathered}$

The answer is y=20 and the pair x-y is (0,20)

2) Second row

Set x=1 and solve, as follows:

$\begin{gathered} -10(1)-y=-20 \\ \Rightarrow-10-y=-20 \\ \Rightarrow-y=-10 \\ \Rightarrow y=10 \end{gathered}$

The answers are y=10 and (1,10)

3) Third row.

Set y=0 and solve as follows:

$\begin{gathered} -10x-(0)=-20 \\ \Rightarrow-10x=-20 \\ \Rightarrow x=\frac{20}{10}=2 \\ \Rightarrow x=2 \end{gathered}$

The answers are x=2 and (2,0)

6 0

1 year ago

"Eight more than twice a number" can be written as what algebraic expression?

Ainat [17]

" 8 more "....means add 8
" twice a number " means multiply the number by 2

ur expression is : 2n + 8

7 0

3 years ago

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How many cubic feet are equivalent to 1 cubic yard?explain?

motikmotik

(1 yard )3 = 13 yard*yard*yard = 1 yard*yard*yard = 1 cubic yard . Since 1 yard = 3 feet, we have.
1 cubic yard = (1 yard)3 = (3 feet)3 = 33 feet*feet*feet = 27 cubic feet.

8 0

3 years ago

Right triangles abc and dbc with right angle c are given below. If cos(a)=15,ab=12 and cd=2, find the length of bd.

dmitriy555 [2]

see the attached figure to better understand the problem

we have that

$cos(A)=\frac{1}{5} \\ AB=12\ units\\ CD=2\ units$

Step 1

Find the value of AC

we know that

in the right triangle ABC

$cos (A)=(AC/AB)\\AC=AB*cos(A)$

substitute the values in the formula

$AC=12*(1/5)\\ AC=2.4\ units$

Step 2

Find the value of BC

we know that

in the right triangle ABC

Applying the Pythagorean Theorem

$AB^{2} =AC^{2}+BC^{2}\\ BC^{2}=AB^{2} -AC^{2}$

substitute the values

$BC^{2}=12^{2} -2.4^{2}\\BC^{2}= 138.24\\ BC=11.76\ units$

Step 3

Find the value of BD

we know that

in the right triangle BCD

Applying the Pythagorean Theorem

$BD^{2} =DC^{2}+BC^{2}$

substitute the values

$BD^{2} =2^{2}+11.76^{2}$

$BD=11.93\ units$

therefore

the answer is

the length of BD is 11.93 units

8 0

3 years ago

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Write a division number story with an answer of 1/4

Rasek [7]

Answer:

Once upon a time I had 4 candies. there were 4 kids to share to (including me). what fraction of the candies does each child get

Step-by-step explanation:

4÷4=1

1/4

7 0

3 years ago

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