Find a ⋅ b.

a = 9i + 5j, b = 4i + 3j

Answer:

THe pattern switches to negative then positive

-4,4

Step-by-step explanation:

Answer:

I like him too.

Step-by-step explanation:

Answer:

v = ~122.23 m/s

Step-by-step explanation:

180(2.8) + 65(3.5) + 200 = 931.5

931.5/(2.8 + 3.5 + 2) = 122.2289 ≈ 122.23 = va

Step-by-step explanation:

hello

2×12*2 (12-5)/10

24*2 (7)/10

576×7/10

4032/10

403,2

Answer:

95 cm^2

Step-by-step explanation:

perimeter(p)=39cm

L=3x-1

B=2x+3

Now,

p=2(l+b)

39=2(3x-1+2x+3)

39=6x-2+4x+6

39=10x+4

39-4=10x

x=35/10

x=3.5

Putting the value of x

L=3x-1; =3×3.5-1; =10.5-1; =9.5cm

B =2x+3; =2×3.5+3; =7+3; =10cm

Again,

A= L×B

=9.5×10

=95cm^2

Answer:

∠A = ∠D  (**but very important Δ ABC has to be congruent to Δ DEF)

Step-by-step explanation:

It will help if you draw the triangles out and label the same sides. Then according to the side-angle-side (SAS) rule, ∠A should be equal to ∠D

Answer:

Ariana Grande 100%

Step-by-step explanation:

Answer:

Ariana

Step-by-step explanation:

Answer:

4,3 difference

Step-by-step explanation:

|-5,-5|=5,5

|-9,-2|=9,2

9-5=4

5-2=3

4,3 difference

Answer:

72 cm²

Step-by-step explanation:

Area of a ∆ = 1/2 × b × h

b = 12 cm

h = 12 cm

Area = 1/2 × 12 × 12

= 1/2 × 144

= 72 cm²

Answer:

Answer:

A

Step-by-step explanation:

can I have Brainliest if right

Answer:

2

Step-by-step explanation:

1600/800=2 hope it helps

Answer:

i can't see the picture!!!

Step-by-step explanation:

Answer:

50% are boys

Step-by-step explanation:

Total number of kids: 18+15=33

Percent of boys: 15/33=0.4545 repeating

0.4545 rounded to tenth: 0.5

0.5 to percent: 50%

Answer:

your answer will be C. B´C=8. m ZA=28

Step-by-step explanation:

hope it helps have a nice day

After dilation of ΔABC, the length of B'C' = 8m and ∠A' = 28°.

Dilation means changing the size of an object without changing its shape. The size of the object may be increased or decreased based on the scale factor.

When the triangle undergoes dilation, the length of its sides gets multiplied by 1/2 (dilation factor) but the angles remain the same ( since, the shape has to remain same).

Learn more about dilation here,

https://brainly.com/question/13176891

#SPJ2

Answer:

d

its by 5

Step-by-step explanation:

5÷5=1

10÷5=2

15÷5=3

20÷5=4

25÷5=5

Answer: 720

Step-by-step explanation:

From the question, we are informed that cthe researches counted 400 turtles, of which 20 were marked. This implies that 20/400 = 1/20 were marked.

If the researchers wanted to track the reptile population around a lake, and the researchers marked 36 turtles, the estimate of the total population will then be:

1/20 × x = 36

x/20 = 36

x = 20 × 36

x = 720

The turtle population is 720

Answer:

1 1/6

Step-by-step explanation:

im guessing you need this fast so i wont explain it

Answer: [tex]15\times\frac{1}{2}[/tex]

Explanation:

Multiplying by 1/2 is the same as dividing by 2.

For example, if you have 10 slices of cake and 2 friends, then each friend gets 10/2 = 5 slices. We could also say [tex]10\times \frac{1}{2} = 5[/tex]

The fraction 1/2 converts to the decimal form 0.5, which means [tex]10 \times \frac{1}{2} = 10*0.5[/tex]

Answer:

12 [tex]\frac{1}{2}[/tex]

Step-by-step explanation:

Put 5 in fraction form ( [tex]\frac{5}{1}[/tex] ) and multiply it by [tex]\frac{5}{2}[/tex]

[tex]\frac{5}{1}[/tex]×[tex]\frac{5}{2}[/tex] = [tex]\frac{25}{2}[/tex]   now simplify  to 12 [tex]\frac{1}{2}[/tex]

Answer:

Step-by-step explanation:

53-24=29 books purchased

Answer:

Let "x" be the number of books that Joan bought at the yard sale

24+x=53

x=29

Joan bought 29 books at the yard sale.

Let me know if this helps!

Answer:

6 * 10^2

Step-by-step explanation:

Simplify : (4.2×10^7)÷(7×10^4)

(4.2 × 10^7) / (7 × 10^4)

From indices : 10^a ÷ 10^b = 10^(a - b)

(4.2 / 7) * 10^(7-4)

0.6 * 10^3

= 6 * 10^2

Hence, (4.2×10^7)÷(7×10^4) = 6 * 10^2

Answer: 9 ( 2 terms)

10 ( i think it is C)

Step-by-step explanation:

#10 c sounds smart out of all the choices

Answer:

the answer  is c

Step-by-step explanation:

if right pls give brainleist

8*22 = 22*8

Hope this helps!

Answer:

2 1/4 or 9/4

Step-by-step explanation:

Because if you add up all the fractions and simplify them they equal 5/4 and if u add the 1 gallon to it it equals 1 5/4 but thats not it 5/4 also makes up a whole gallon its self with 1/4 left over

Answer:313.1

Step-by-step explanation:

Answer:

It took Riley 9 hours to clean the garage.

Step-by-step explanation:

With the information provided, you can say that the amount Riley earns for cleaning the garage is equal to the price per hour for the number of hours it takes to clean the garage, which can be express as:

x=4.25y, where:

x is the amount Riley earns for cleaning the garage

y is the number of hours it takes to clean the garage

Now, you can replace x with $38.25 that is the amount that Riley earned and you can solve for y to find how long it took her to clean the garage:

38.25=4.25y

y=38.25/4.25

x=9

According to this, the answer is that it took Riley 9 hours to clean the garage.

Answer:

x=9                   x=-1

Step-by-step explanation:

2(x-4)^2=50

Divide each side by 2

2/2(x-4)^2=50/2

(x-4)^2=25

Take the square root of each side

sqrt((x-4)^2)=sqrt(25)

x-4 = ±5

x-4 =5            x-4 = -5

Add 4 to each side

x-4+4=5+4    x-4+4 = -5+4