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3 years ago

Please help! will mark brainliest

Mathematics

2 answers:

zaharov [31]3 years ago

8 0

Answer:

4. Obtuse Isosceles

5. B.

6. A, B and D.

Step-by-step explanation:

erma4kov [3.2K]3 years ago

5 0

Answer:

4. Isosceles and Obtuse

5. B

6. A, B, D

Step-by-step explanation:

An Isosceles Triangle has 2 or more congruent sides, and it states that it is obtuse.

An acute isosceles is B because there is at least 2 congruent sides and it is all acute (angles less than 90 degrees)

It is a quadrilateral (4 sides), rectangles (2 pairs of parallel sides and 4 right angles), and a parallelogram (2 pairs of parallel sides)

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Rex paid $250 in taxes to the school district that he lives in this year. This year's taxes were a 12% increase from last year.

Verizon [17]

Answer:

$223.21

Step-by-step explanation:

Last year the amount of taxes was x, an unknown amount. That was 100% of last year's tax cost.

This year, taxes went up by 12%, so this year the taxes are 112% of what they were last year. This year the taxes were 112% of x, and they were $250.

112% of x = 250

1.12x = 250

x = 250/1.12

x = 223.21

Answer: $223.21

8 0

3 years ago

Let y′′′−9y′′+20y′=0. find all values of r such that y=erx satisfies the differential equation. if there is more than one correc

DerKrebs [107]

we are given

differential equation as

$y'''-9y''+20y'=0$

we are given

$y=e^{rx}$

Firstly, we will find y' , y'' and y'''

those are first , second and third derivative

First derivative is

$y'=re^{rx}$

Second derivative is

$y''=r*re^{rx}$

$y''=r^2e^{rx}$

Third derivative is

$y'''=r^2*re^{rx}$

$y'''=r^3e^{rx}$

now, we can plug these values into differential equation

and we get

$r^3 e^{rx}-9r^2 e^{rx}+20re^{rx}=0$

now, we can factor out common terms

$e^{rx}(r^3 -9r^2 +20r)=0$

we can move that term on right side

$(r^3 -9r^2 +20r)=0$

now, we can factor out

$r(r^2 -9r +20)=0$

$r(r-5)(r-4)=0$

now, we can set them equal

$r=0$

$r-5=0$

$r=5$

$r-4=0$

$r=4$

so, we will get

$r=0,4,5$ ...............Answer

4 0

3 years ago

3 3/4 ÷ 4 1/2 = ????????????????

nata0808 [166]

Answer:

$\frac{5}{6}$

6 0

3 years ago

Read 2 more answers

A rectangular dog cage has a length of 4 1/2 feet and a width of 3 3/7 feet. What is the area of the cage?

liberstina [14]

Step-by-step explanation:

Area of rectangle =height×base

4 1/2×3 3/7=9/2×24/7=216/14=15 6/14=15 3/7

3 0

3 years ago

kofi and kojo were given 380 to share .kojo had 75 more than kofi. If kofi share is x find an expression for kojo share

AleksAgata [21]

Answer:

227.5

Step-by-step explanation:

x=Kofi

x+75=Kojo

x+x+75=380

2x+75=380

2x=305

x=152.5

Kojo=152.5 plus 75

227.5

4 0

3 years ago