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2 years ago

Please help. 15 points and brainliest if correct!

Mathematics

1 answer:

Ivahew [28]2 years ago

3 0

Answer:

2 and 3

Step-by-step explanation:

hope this helps!❄︎

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For which values of x is the expression x4 – 10x2 less than -9?

Julli [10]

$x^4-10x^2\ \textless \ -9\\
x^4-10x^2+9\ \textless \ 0\\
x^4-x^2-9x^2+9\ \textless \ 0\\
x^2(x^2-1)-9(x^2-1)\ \textless \ 0\\
(x^2-9)(x^2-1)\ \textless \ 0\\
(x-3)(x+3)(x-1)(x+1)\ \textless \ 0\\
x\in(-3,-1)\cup(1,3)
$

4 0

3 years ago

Read 2 more answers

Work out the height of this triangle with base, b = 5.9mm and area, A = 149.27mm2.

AlekseyPX

Answer:

50.6

Step-by-step explanation:

50.6*5.9=298.54/2=149.27

5 0

3 years ago

Help please help please

scoundrel [369]

Answer:

just use algebraic expression

8 0

3 years ago

Bianca can run 5 miles in 41 minutes. Assuming she runs at a constant rate, write the linear equation that represents the situat

ale4655 [162]

Answer:

y=5/41x

Step-by-step explanation:

Alright, so we can get imagine two points. Imagine that the y axis is miles and the x axis is minutes. When bianca runs 0 miles, she would have run for 0 minutes, and we know that when Bianca runs 5 miles, she would have run for 41 minutes.

We can use slope formula using the change in y over change in x

$(y1 -y2)/(x1-x2)\\$

So substituting values, we would get (5-0)/(41-0) or 5/41

slope is the letter m in the formula y=mx+b

so our equation would be $y=\frac{5}{41}x+b$ , b being the y intercept, which would be 0 as you cant run anything when no time has passed

Knowing all of this. the final equation is

$y=\frac{5}{41}x$

6 0

3 years ago

1. The length of a rectangle is 90 in. Its area is less than 380 in-. What is the

Tamiku [17]

To find the area of a rectangle, do length times width. Because we know the length (90 in), we can divide 380 by 90 to find the maximum possible width. This is possible because of the equation width = Area/length, which is derived from width * length = Area. 380/90 = 4.222, so the maximum width to the nearest possible inch is 4 inches.

7 0

4 years ago