this is a math test and i really need help. ill give brainliest

Answer:

(n+1) (3n^2-1)

Step-by-step explanation: group the factor out the greatest common factor (GCF) then combine.

Answer:

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Step-by-step explanation:

Answer:

B = 40° and D = 60°

Step-by-step explanation:

Just subtract the angles you already know from 90° (since perpendicular means right angle, which is 90°).

Answer:

(a) O+ to A+

[tex]O+:A+=90:45[/tex]

[tex]O+:A+=18:9[/tex]

[tex]O+:A+=2:1[/tex]

(b) AB- : AB+

[tex]AB-:AB+ = 6:4[/tex]

[tex]AB-:AB+ = 3:2[/tex]

[tex]AB-:AB+ = 12:8[/tex]

(c): B+ to total

[tex]B+ : Total = 20 : 195[/tex]

[tex]B+ : Total = 4 : 39[/tex]

[tex]B+ : Total = 40 : 390[/tex]

Step-by-step explanation:

Given

[tex]A+ = 45[/tex]       [tex]B+ = 20[/tex]        [tex]AB+ =6[/tex]        [tex]O+=90[/tex]

[tex]A-=21[/tex]       [tex]B-=0[/tex]          [tex]AB-=4[/tex]          [tex]O-=9[/tex]

[tex]Total = 195[/tex]

See attachment

Required

Solving (a): O+ to A+

We have:

[tex]A+ = 45[/tex]

[tex]O+=90[/tex]

So, the ratio is:

[tex]O+:A+=90:45[/tex] ---- first comparison

Divide by 5

[tex]O+:A+=90/5:45/5[/tex]

[tex]O+:A+=18:9[/tex] ---- Second comparison

Divide by 45

[tex]O+:A+=90/45:45/45[/tex]

[tex]O+:A+=2:1[/tex] ---- Third comparison

Solving (b): AB- to AB+

We have:

[tex]AB+ =6[/tex]

[tex]AB-=4[/tex]

So, the ratio is:

[tex]AB-:AB+ = 6:4[/tex] ---- first comparison

Divide by 2

[tex]AB-:AB+ = 6/2:4/2[/tex]

[tex]AB-:AB+ = 3:2[/tex] ---- Second comparison

Multiply by 2

[tex]AB-:AB+ = 6*2:4*2[/tex]

[tex]AB-:AB+ = 12:8[/tex] ---- Third comparison

Solving (c): B+ to total

We have:

[tex]B+ = 20[/tex]

[tex]Total = 195[/tex]

So, the ratio is:

[tex]B+ : Total = 20 : 195[/tex] ---- first comparison

Divide by 5

[tex]B+ : Total = 20/5 : 195/5[/tex]

[tex]B+ : Total = 4 : 39[/tex] ---- Second comparison

Multiply by 2

[tex]B+ : Total = 20*2 : 195*2[/tex]

[tex]B+ : Total = 40 : 390[/tex] ---- Third comparison

Answer:

y=-4

x=-2

Step-by-step explanation:

Given:

x+y=-6

y=2x

So, you can then substitute y for 2x

x+(2x)=-6

Then, solve for x

3x=-6

x=-2

Then solve for y

y=2x=2(-2)=-4

Given:

In triangle ABC, right angle at angle C.

[tex]a = 33[/tex] meters

[tex]m\angle A=29^\circ[/tex]

To find:

The measure of side c.

Solution:

In a right angle triangle,

[tex]\sin \theta =\dfrac{Perpendicular}{Hypotenuse}[/tex]

It is also written as:

[tex]\sin \theta =\dfrac{Opposite}{Hypotenuse}[/tex]

In triangle ABC, angle C is a right angle. It means the side c is the hypotenuse.

In triangle ABC,

[tex]\sin A=\dfrac{a}{c}[/tex]

[tex]\sin 29^\circ=\dfrac{33}{c}[/tex]

[tex]c=\dfrac{33}{\sin 29^\circ}[/tex]

On further simplification, we get

[tex]c=\dfrac{33}{0.4848}[/tex]

[tex]c=68.0693[/tex]

[tex]c\approx 68.07[/tex]

Therefore, the measure of side c is 68.07 meters.

Answer  8

Step-by-step explanation    

Answer:

its 27

Step-by-step explanation:

give brainliest plz

Answer:

4. - (0.69,0.87)

Answer: -2

Step-by-step explanation:

Answer:

x would equal 40

Step-by-step explanation:

x+(2x-5)+(x+25)=180

4x+20=180

x=40

Answer: yes y=2x-3, y=x+2 :  y=7, x=5

Answer:

f(x) = -½x + 16

Step-by-step explanation:

Using two points in the line, (0, 16) and (4, 14), we can write an equation for the linear function in the slope-intercept form, f(x) = mx + b, by finding the slope (m) and the y-intercept (b), then substituting each of the value into f(x) = mx + b.

✔️Slope (m) = change in y/change in x

Using, (0, 16) and (4, 14),

Slope (m) = (14 - 16)/(4 - 0) = -2/4

m = -½

✔️y-intercept (b) would be the value of y when x = 0, or the point at which the y-axis is intercepted by the line.

Thus,

When x = 0, y = 16

Therefore,

b = 16

✅Write the equation of the function by substituting m = -½ and b = 16 into f(x) = mx + b

Thus:

f(x) = -½x + 16

Answer:

n = 24

p(a) = 10/24

p(b) = 15/24

[ p(a) + p(b) - [p(a) ×p(b)] ] -1 = answer

[ 35/24 - 6/24 ] -1 = 39/24 - 24/24 = 5/24

=================================================

Explanation:

There are 24 people total and 18 of them study at least one subject. So that must mean 24 - 18 = 6 people do not study any of the subjects mentioned.

The values of 10 and 15 aren't used at all.

Answer:

Answer:

the correct answer is b) 3-5/x

Answer:

what do i do???

Step-by-step explanation:

Answer:

29

Step-by-step explanation:

It has more than 2 factors.

Answer: i think C correct me if i am wrong

Step-by-step explanation:

Answer:

you can use SSA to prove congruence. side DE and AB are congruent, and C and F are both right angles

Answer:

yes, that information is sufficient

Step-by-step explanation:

when y is given, you can prove that the triangles are congruent by RHS axiom. R- right angle H-hypotenuse S- side

Answer:

I believe it is the first one y= 2 - 3

Step-by-step explanation:

Answer:

1/3 x 8^2×pi(3.14)

Step-by-step explanation:

1/3 × 64 × 3.14

[tex]21 \frac{1}{3} \pi[/tex]

Answer:

48.55

Step-by-step explanation:

Answer:

Area = 28.43 cm²

Step-by-step explanation:

area of square = 11.5 x 11.5 = 132.25 cm²

area of circle = πr² = (3.14)(5.75²) = 103.82 cm²

Area= 132.25 - 103.82 = 28.43 cm²

Answer:

28.38 cm²

Step-by-step explanation:

Area of square

a = 11.5^2

a = 132.25

The corners are 4 quarter circle

which makes a complte circle

a = πr^2

a = π(11.5/2)^2

a = 103.8689071093

Area shaded

a = 132.25 - 103.8689071093

a = 28.3810928907

Rounded

a = 28.38 cm²

Answer:

$3.68 underbudget

Step-by-step explanation:

[tex]72*6%\\72*0.06=4.32\\Tax=4.32\\72+4.32=76.32 \ Total\\80-76.32=3.68[/tex]

Hope this helped!

The total cost of pair of sunglasses is $74.88. So, $5.12 Mr. Yates will be under budget.

Given that, Mr. Yates has an $80.00 budget to purchase a $72.00 pair of sunglasses.

Calculating the sales tax applied to a purchase is a matter of simply multiplying the tax rate by the purchase price using the equation sales tax = purchase price × sales tax rate. Adding the sales tax to the original purchase price gives the total price paid with tax.

Here, sales tax = 6% of 72

= 0.04 × 72

= 2.88

So, 72+2.88 = $74.88

Under budget = 80-74.88

=$5.12

Therefore, the total cost of pair of sunglasses is $74.88. So, $5.12 Mr. Yates will be under budget.

To learn more about the sales tax visit:

brainly.com/question/27092799.

#SPJ2

Answer:

B. 6

Step-by-step explanation:

Step 1: Subtract 3 from both sides.

6=n

Answer B. 6 equals n

Step-by-step explanation:

9 = 6 + 3

Answer:

y = 2x + 1

Step-by-step explanation:

i used desmos

Answer:

A and B are functions

Step-by-step explanation:

for A, none of the x's repeat which makes it a FUNCTION

for B, when it starts with x^2, it will always be a FUNCTION (its a quadratic)

for C, 10 repeats for the x so it is NOT A FUNCTION