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2 years ago

What is the sum of (8a+2b-4) and (3b-5)

Mathematics

1 answer:

Yuki888 [10]2 years ago

7 0

Answer:

8a+5b-9

Step-by-step explanation:

(8a+2b-4)+(3b-5)

8a+2b+3b-4-5

8a+5b-9

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On the njmber line below, the numbers x and y are the same distance from 0. What is x + y? Explain how you found your answer

Elena-2011 [213]

Answer:

Step-by-step explanation:

either x+y=0

∵ if they are on number line and at same distance. then x=-y

or x+y=0

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2 years ago

What is the value of a? <br> Answer options: 27.5, 90, 45, 50

Vikentia [17]

Answer:

90°

Step-by-step explanation:

Arc a subtends and angle of 45° to the circumference of the circle

We know that;

An angle subtended by an arc to the center of a circle is twice the angle subtended by the same chord to the center of the circle.

Therefore, if arc a subtends and angle of 45° to the circumference of the circle then;

a will be = 45 × 2

= 90°

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2 years ago

In God's redemptive plan for mankind, the Feast of Weeks was a "shadow" or "type" of:

navik [9.2K]

Answer:

burnt offerings

Step-by-step explanation:

3 0

3 years ago

Vince has a rectangular rug in his room with an area of 10 ft the length of the rug is 18 inches longer than the width what coul

aev [14]

The length of the rug is 4 ft.

The width of the rug is 2.5 ft.

Explanation:

The area of the rug is 10 ft.

The length of the rug be l.

Let us convert the inches to feet.

Thus, $18 inches = 1.5 ft$

Thus, the length of the rug is $l=1.5+w$

Let the width of the rug be w.

Substituting these values in the formula of area of the rectangle, we get,

$A=length\times width$

$10=(1.5+w)(w)\\10=1.5w+w^2\\w^2+1.5w-10=0$

Solving the expression using the quadratic formula,

$w=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}$

Substituting the values, we have,

$$w=\frac{-15 \pm \sqrt{15^{2}-4 \cdot 10(-100)}}{2 \cdot 10}\\$

$w=\frac{-15 \pm \sqrt{4225}}{20}$

$w=\frac{-15 \pm 65}{2 0}$

Thus,

$w=\frac{-15 + 65}{2 0}\\w=\frac{50}{20} \\w=2.5$ and $w=\frac{-15 - 65}{2 0}\\w=\frac{-80}{20} \\w=-4$

Since, the value of w cannot be negative, the value of w is 2.5ft

Thus, the width of the rug is 2.5ft

Substituting $w=2.5$ in $l=1.5+w$ , we get,

$l=1.5+2.5\\l=4$

Thus, the length of the rug is 4 ft.

4 0

2 years ago

PLEASE HELP WILL GIVE 10 POINTS!<br><br> Subtract. −3 2/7−(−5/7)

SashulF [63]

your answer would be -2.57142857143

6 0

2 years ago