Ask question

Ask question

All categories

Marta_Voda [28]

2 years ago

8

Jonna is 4 years older than her brother. Which of the following expressions shows the sum of their ages if b represents Jonna's

brother's age? a. 2b + 4
b. b + 4
c. 2(b + 4)
d. 4b

1 answer:

Sedbober [7]2 years ago

4 0

B. B+4
This should be right because if the brothers age is b and Jonna's age is 4 years older then it would be b+4

You might be interested in

What is the gradient of the blue line.

denpristay [2]

Answer:

Step-by-step explanation:

the Gradient is (5,2)

6 0

3 years ago

Read 2 more answers

Find an exact value. Cos 75° negative square root of six plus square root of two quantity square root of six minus square root o

ehidna [41]

Answer:

√2(√3 - 1)/4

Step-by-step explanation:

To find an exact value for Cos75°, we use the compound angle formula. Since 75° = 45° + 30°, Cos75° = Cos(45° + 30°).

Using Cos(A + B) = CosACosB - SinASinB where A = 45° and B = 30°,

Cos75° = Cos(45° + 30°) = Cos45°Cos30° - Sin45°Sin30°

Now Cos45° = Sin45° = 1/√2 = √2/2, Cos30° = √3/2 and Sin30° = 1/2.

Substituting these values into the above equation, we have

Cos75° = Cos(45° + 30°)

= Cos45°Cos30° - Sin45°Sin30°

= √2/2 × √3/2 - √2/2 × 1/2

= √6/4 -√2/4

= √2(√3 - 1)/4

6 0

3 years ago

1. Part A: Use the properties of exponents to explain why 64^1/2 is called the square root of 64.

Dmitriy789 [7]

A: When you multiply two numbers, their exponents add.
So, $64^{\frac{1}{2}} * 64^{\frac{1}{2}} = 64^{\frac{1}{2} + \frac{1}{2}} = 64^{1} = 64$

Since 64^1/2 multiplied by itself is 64, then it is the square root of 64.

B: The area is irrational. 7 * √7 is irrational.

8 0

3 years ago

Read 2 more answers

Wendy is helping her mom put candy in 217 giftbagd. Each bag has 7 pieces of candy. She already put 58 pieces of candy in the ba

Ganezh [65]

Answer:

406 pieces. If you multiply 58 times 7 you get 406. 406 divided by 58 is 7.

4 0

2 years ago

Help on a and b....................

Maksim231197 [3]

You need to show what a and b are plz

5 0

3 years ago

Read 2 more answers