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3 years ago

Please help its a test!

Mathematics

1 answer:

Kamila [148]3 years ago

3 0

Answer:

I think it might be either c or d

Step-by-step explanation:

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Solve the system of equations.<br> - 9x - 6y = 15<br> 9x – 10y = 145<br> X =<br> Y =

ss7ja [257]

The answer is X = 5, and Y = -10 I hope this helps!! Please mark me brainliest

3 0

3 years ago

Ms. Sze is grading math tests. A student’s work on a problem is givenbelow: 0.23 × 2.07 = 0.04761 Is the student correct?

nevsk [136]

Answer:

No, he is not correct.

Step-by-step explanation:

0.23 × 2.07 = 0.4761

Multiply 0.23 and 2.07 to get 0.4761.

0.4761=0.04761

Compare 0.4761 and 0.04761.

False

7 0

2 years ago

Which pair shows equivalent expressions?

Alona [7]

Answer:

Option 3

Step-by-step explanation:

We need to find a pair which shows equivalent expressions.

First equation is

$2x+10=-2(x-5)$

$LHS=2x+10$

$RHS=-2(x-5)=-2(x)-2(-5)=-2x+10$

$LHS\neq RHS$

Option 1 is incorrect.

Second equation is

$-2(x+5)=2x-10$

$LHS=-2(x+5)=-2(x)-2(5)=-2x-10$

$RHS=2x-10$

$LHS\neq RHS$

Option 2 is incorrect.

Third equation is

$-2x-10=-2(x+5)$

$LHS=-2x-10$

$RHS=-2(x+5)=-2(x)-2(5)=-2x-10$

$LHS=RHS$

Option 3 is correct.

Fourth equation is

$-2(x–5)=-2X-10$

$LHS=-2(x–5)=-2(x)-2(-5)=-2x+10$

$RHS=-2x-10$

$LHS\neq RHS$

Option 4 is incorrect.

Therefore, the correct option is 3.

3 0

3 years ago

What does this symbol tell you to do (:) ?

Monica [59]

Answer:

That separeates the problem

Step-by-step explanation:

4 0

3 years ago

15. What is the area of ADEF shown in the figure? Show your work.

Mariulka [41]

Answer:

A = 189 yd²

Step-by-step explanation:

The area (A) of a triangle is calculated as

A = $\frac{1}{2}$ bh ( b is the base and h the perpendicular height )

Here b = DE = 21 , h = the line from F to DE = 18 , then

A = $\frac{1}{2}$ × 21 × 18 = 10.5 × 18 = 189 yd²

4 0

2 years ago