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3 years ago

Can some help ...:.....0

Mathematics

1 answer:

frozen [14]3 years ago

7 0

Answer:

-4

Step-by-step explanation:

Two legs of the triangle are congruent as shown by the tick marks. This means that this is an isosceles triangle; in an isosceles triangle, the two base angles are also congruent. Which means <A and <B are congruent.

So to solve for x, set 28 and 10x+68 equal to each other.

28=10x+68

First, subtract 68 from both sides

-40=10x

Then, divide both sides by 10

-4=x

If you want to check your answer plug -4 back into the original equation.

28=10(-4)+68

28=-40+68

28=28, which is true, therefore -4 is correct.

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3 years ago

Express your answer in scientific notation. 4.1 x 10^-2 - 2.6 x 10^-3

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$(4.1 \times {10}^{ - 2}) - (2.6 \times {10}^{ - 3}) = \\$

$(4.1 \times {10}^{ - 2}) - (0.26 \times {10}^{ - 2}) = \\$

$Factoring \: \: {10}^{ - 2}$

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_________________________________

And we're done.

Thanks for watching buddy good luck.

♥️♥️♥️♥️♥️

4 0

3 years ago

2x + 4y =450 4x + 2y = 420

masya89 [10]

2x+4y=450

2x=450-4y

x=450-4y÷2----- equation 1

4x+2y=420

4x=420-2y

x=420-2y÷4----- equation 2

putting the value of x in equation 1

x=450-4y÷2

420-2y÷4=450-4y÷2

2(420-2y)=4(450-4y)

840-4y=1800-16y

840-1800=-16y-4y

-960= -12y

y=80

putting the value of y in equation1

2x+4y=450

2x+4×80=450

2x+320=450

2x=450-320

2x=130

x=130÷2

x=65

<h2> the value of x is 65 and y is 80</h2>

7 0

3 years ago