3 years ago

Which problem can be solved by this number sentence? 3 × 7 = 21

Mathematics

1 answer:

vlada-n [284]3 years ago

5 0

11+10=?????????????????????

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4) If a = 28 and b = 4, then a/b = ______

exis [7]

Answer:

Step-by-step explanation:

You divided both 28 and 4 and you will get 7 as your answer.

7 0

3 years ago

Find the value of a and of b for which<br>(a) the solution of x2 + ax < b is<br>-2<x < 4

KengaRu [80]

Answer: $a = -2$

$b = 8$

Step-by-step explanation:

Given :

$x^{2} +ax$

re - writing the equation , we have

$x^{2} +ax-b$

we need to find the value of a and b for which -2<x < 4 , this means that the roots of the quadratic equation are -2<x < 4.

The formula for finding the quadratic equation when the roots are known is :

$x^{2}$ - sum of roots(x) + product of root = 0

sum of roots = -2 + 4 = 2

product of roots = -2 x 4 = -8

substituting into the formula , we have:

$x^{2} -2x-8=0$ , which could be written in inequality form as

$x^{2} -2x-8$

comparing with $x^{2} +ax-b$ , it means that :

$a = -2$

$b = 8$

3 0

3 years ago

During a certain period of time, about 70 northern sea otters had an annual growth of 18%. Use an exponential function to find t

Alenkinab [10]

Answer:

135.71 sea otters

Step-by-step explanation:

y = 70(1.18)^4

y = 70 x 1.9387

y = 135.71

6 0

2 years ago

30-1 divided by 1/25

Alexxx [7]

Answer:

725

Step-by-step explanation:

30 - 1 = 29

29 x (25/1) = 725

3 0

2 years ago

What is the value of 7/8 ÷ 11/12

iogann1982 [59]

The value would be 0.95454545454 (well if you put it in a calculator then this would be your answer)

6 0

3 years ago

Read 2 more answers