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3 years ago

Please help

Mathematics

1 answer:

Serhud [2]3 years ago

3 0

Answer:

y=-15x-2

Step-by-step explanation:

Please help

Which of the following is the equation of the line that is parallel to the graph of y = 5x + 7 and has y-intercept at (0, -2)

y=−15x−2

y is equal to negative 1 fifth x minus 2

y=5x−2

y is equal to 5 x minus

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Can someone please check this?

Naddik [55]

The first one in incorrect , it should be 130 but the rest are correct !

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4 years ago

Factor completely.

Serga [27]

Factor the polynomial:

4u² – 20u + 25

Rewrite – 20u as – 10u – 10u, and then factor it by grouping:

= 4u² – 10u – 10u + 25

= 2u * (2u – 5) – 5 * (2u – 5)

= (2u – 5) * (2u – 5)

= (2u – 5)² <––– this is the answer.

I hope this helps. =)

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3 years ago

What does a proportion look like?

AURORKA [14]

A proportion looks like this:

$a\div b = c\div d$

It means that the quantity a,b,c and d are in the same proportion: the ratio between a and b is the same ratio between c and d.

They are particularly useful in situation when you have an example given, and you want to extrapolate the relationship for another couple.

For example, you can think of the following problem: "Five apples cost 2 dollars. How much will 8 apples cost?"

You can build the proportion

$5\div 2 = 8\div x$

And then solve it for x:

$\dfrac{5}{2}=\dfrac{8}{x} \iff 5x=16 \iff x = \dfrac{16}{5} = 3.2$

6 0

3 years ago

Solve the expression x^2-100=0

enot [183]

Answer:

x = ± 10

Step-by-step explanation:

Given

x² - 100 = 0 ( add 100 to both sides )

x² = 100 ( take the square root of both sides )

x = ± $\sqrt{100}$ ← note plus or minus, hence

x = ± 10

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3 years ago

ABCD×9=DCBA<br>(what is the value of A, B, C and D)

Anettt [7]

Answer:

Step-by-step explanation:

The only value that would make sense is if at least one of the variables (A , B , C , D) is 0 (if not all of them). When multiplied, the answer will still be 0, thereby making the equation true.

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3 years ago