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3 years ago

What equations make c=9 a solution

Mathematics

1 answer:

Charra [1.4K]3 years ago

3 0

Equation 4 and 5 because when you substitute 9 as c it is equal

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I don’t know if the first one is right but could someone guess true or false?

victus00 [196]

Answer:

B) false D) true E) true

Step-by-step explanation:

Plug in numbers to disprove the first one.

Area formula for triangles says D is true

It's the Pythagorean's Theorem for Heaven's sakes.

3 0

4 years ago

Jay bought 6 bags of maize at shs 2700 each.He sold the bags at shs.3300 each. what was his profit?

NISA [10]

Answer:

3300-2700= 600 x 6 = 3600

7 0

3 years ago

A line passes through (9, –9) and (10, –5).Write an equation for the line in point-slope form.

Ket [755]

bearing in mind that standard form for a linear equation means

• all coefficients must be integers, no fractions

• only the constant on the right-hand-side

• all variables on the left-hand-side, sorted

• "x" must not have a negative coefficient

$\bf (\stackrel{x_1}{9}~,~\stackrel{y_1}{-9})\qquad (\stackrel{x_2}{10}~,~\stackrel{y_2}{-5}) \\\\\\ slope = m\implies \cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{-5-(-9)}{10-9}\implies \cfrac{-5+9}{1}\implies \cfrac{4}{1}\implies 4$

$\begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-(-9)=4(x-9)\implies\underline{y+9=4(x-9)} \\\\\\ y+9=4x-36\implies y=4x-45\implies \stackrel{standard~form}{\underline{-4x+y=-45}}$

quick note:

the "x" must not have a negative coefficient for the standard form, though in this case it shows like so in the inappropriate choices above.

5 0

3 years ago

What are the values of x and y in the parallelogram?

postnew [5]

9514 1404 393

Answer:

x = 60

y = 30

Step-by-step explanation:

Adjacent angles are supplementary.

(5x -180) +x = 180

6x = 360 . . . . . . . . . . add 180, collect terms

x = 60 . . . . . . . . divide by 6

Opposite angles are congruent.

2y = 60 . . . . . . 2y = x

y = 30 . . . . . . . .divide by 2

The value of x is 60; the value of y is 30.

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3 years ago

Max bought CDs online. He paid $157.20 for 15 CDs, including the $12 shipping and handling fee. If each of the 15 CDs was the sa

7nadin3 [17]

Answer:

$11.28 per cd

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers