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3 years ago

26 POINTS WILL GIVE BRAINLIEST

1 answer:

8 0

2: They do not because the hypotenuse is larger and a^2 + b^2
3. The tiangle is acute because it has all angles smaller than 90*
12: The buillding is approximately 100 ft tall give or take. I am sorry If i am wrong on the last one

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3) x2+ y2 - x + 3y - 42 = 0<br> X+y=4

REY [17]

The solution is $(-1,5)$ and $(7,-3)$

Step-by-step explanation:

The expression is $x^{2} +y^{2} -x+3y-42=0$ and $x+y=4$

Using substitution method we can solve the expression.

Let us substitute $x=4-y$ in $x^{2} +y^{2} -x+3y-42=0$

$(4-y)^{2} +y^{2} -(4-y)+3y-42=0$

Expanding and simplifying the expression, we get,

$\begin{array}{r}{16-8 y+y^{2}+y^{2}-4+y+3 y-42=0} \\{2 y^{2}-4 y-30=0}\end{array}$

Let us use the quadratic equation formula to solve this equation,

$\begin{aligned}y &=\frac{4 \pm \sqrt{16-4(2)(-30)}}{2(2)} \\&=\frac{4 \pm \sqrt{16+240}}{4} \\&=\frac{4 \pm 16}{4} \\y &=1 \pm 4\end{aligned}$

Thus, $y=5$ and $y=-3$

Substituting y-values in the equation $x+y=4$ , we get the value of x.

For $y=5$ ⇒ $x=4-5=-1$

For $y=-3$ ⇒ $x=4+3=7$

Thus, the solution set is $(-1,5)$ and $(7,-3)$

7 0

3 years ago

State the measurement scale for each. a. Cholesterol level b. Defect type c. Time of first class d. Opinion on a 5 point scale,

enyata [817]

Answer: a. Ratio b. Nominal c. Interval d. Ordinal

Step-by-step explanation:

1)Ratio:You can do all sort of arithmetic on the cholesterol level.

2)Nominal: These cannot be ordered or arithmetic cannot be applied

3)Interval: It is interval because it is a number and midnight means 0 so you cannot use it for division

4)Ordinal: You can arrange it in increasing or decreasing order.

6 0

3 years ago

Hit me up if ur bored but what's 7x-2y=23 squared

goblinko [34]

Simplify 7x + 2y = -23 Solving 7x + 2y = -23 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2y' to each side of the equation. 7x + 2y + -2y = -23 + -2y Combine like terms: 2y + -2y = 0 7x + 0 = -23 + -2y 7x = -23 + -2y Divide each side by '7'. x = -3.285714286 + -0.2857142857y Simplifying x = -3.285714286 + -0.2857142857y

5 0

2 years ago

Super Salad Dressing is made with 8 mL of oil for every 3 mL of vinegar. Which mixtures will taste the same as Super Salad Dress

sesenic [268]

Answer: The Answers Are: A, C, E

Step-by-step explanation: Find the Equivalent Ratios! :)

8 0

3 years ago

What's the y-intersept and how can we find it?!

motikmotik

By looking at the graph and seeing which point crosses the y axis. This point will always have an x coordinate of zero.

7 0

3 years ago

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