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3 years ago

Value of the expression 9.7+(- 5.4)

Mathematics

2 answers:

worty [1.4K]3 years ago

6 0

The answer is 4.3 when u value the expression

BARSIC [14]3 years ago

5 0

4.3 I believe. That's the answer I got.

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The expression sin(23°)cos(7°) + cos(23º)sin(7°) is equivalent to

jeka94

Answer:

$\sin(30)$

Step-by-step explanation:

Given

$\sin(23) \cos(7) + \cos(23) \sin(7)$

Required

An equivalent expression

The above is an illustration of the sine formula which states:

$\sin(A) \cos(B) + \cos(A) \sin(B) = \sin(A + B)$

In this case:

$A = 23\\ B = 7$

So:

$\sin(23) \cos(7) + \cos(23) \sin(7) = \sin(23 + 7)$

$\sin(23) \cos(7) + \cos(23) \sin(7) = \sin(30)$

Hence, an equivalent expression is: $\sin(30)$

8 0

3 years ago

A rectangle has a perimeter of 34 cm in an area of 52 cm squared it's length is 5 more than twice its width write and solve the

valina [46]

Let $l$ be the length and $w$ be the width of the rectangle.

Given perimeter of the rectangle

$2(l+w)=34 \; l+w=17$

Area of the rectangle is

$lw=52$

Also length is 5 more than twice its width,

$l=2w+5$

From the above equations

$(l-w)^2=(l+w)^2-4lw=17^2-4*52=81\\ l-w=9,\; since \; l>w$

Now $2l=9+17=26\;,l=13,w=4$

The dimensions of the rectangle are length $l=13$ , and width $w=4$ .

8 0

4 years ago

Read 2 more answers

How do you solve 1/3+1/4?

Otrada [13]

Answer:

Multiply both the numerator and denominator of each fraction by the number that makes its denominator equal the LCD. This is basically multiplying each fraction by 1.

(1/3×4/4)+(1/4×3/3)=?

Complete the multiplication and the equation becomes

4/12+3/12=?

The two fractions now have like denominators so you can add the numerators.

Then:

4+3

12= 7/12

This fraction cannot be reduced.

Therefore:

1/3+1/4=7/12

3 0

3 years ago

One-third of a number, n, minus 7<br> ALGEBRAIC EXPRESSION<br> ASAP ASAP ASAP

Darya [45]

Answer:

$\frac{n}{3} - 7$

Step-by-step explanation:

The comma is important here, otherwise "one third of a number n minus 7" is

$\frac{n - 7}{3}$

4 0

3 years ago

-2/3y - 3/4 = 5? with work please!

IceJOKER [234]

Answer:

-69/8

Step-by-step explanation:

-2/3y - 3/4 = 5

-2/3y = 23/4

y = -69/8

5 0

3 years ago