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velikii [3]
3 years ago
9

Please help

Mathematics
2 answers:
TEA [102]3 years ago
8 0

Answer:

;---;

Step-by-step explanation:

Ira Lisetskai [31]3 years ago
5 0

Answer:

15 yr

Step-by-step explanation:

x- how old she is now

4(x)= x+45

3x=45

x=15

if my answer helps please mark as brainliest.

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3 0
3 years ago
A.Who was the first english mathematician who first used the modern symbol of equality in 1557?
liberstina [14]

Answer:

Robert Recorde.

Step-by-step explanation:

Robert Recorde was a Welsh known for vast knowledge and experience in the field of mathematics and physics. He was born in Tenby, Pembrokeshire, Wales during the Medieval period (c. 1512).

Robert Recorde was famously known for his work in the field of mathematics and most especially, the invention of the equal to (=) sign. He introduced it in his book titled "The Whetstone of Witte."

<em>Hence, Robert Recorde was the first english mathematician who first used the modern symbol of equality in 1557. </em>

8 0
3 years ago
Boston has an area of 90 square miles. It has a population density of 6862 people per square mile. What is the population of Bos
Tamiku [17]
Divide 315,530,612 by 3,539,225 to get 89 people per square mile (rounded)
3 0
3 years ago
Find the slope of this line: (15,7) (3,-2)<br><br> Help
Oliga [24]

Answer:

m=\frac{3}{4}

Step-by-step explanation:

\mathrm{Slope\:between\:two\:points}:\quad \mathrm{Slope}=\frac{y_2-y_1}{x_2-x_1}

\left(x_1,\:y_1\right)=\left(15,\:7\right),\:\left(x_2,\:y_2\right)=\left(3,\:-2\right)

m=\frac{-2-7}{3-15}

\mathrm{Refine}

m=\frac{3}{4}

5 0
3 years ago
Is 67 a multiple of 5
tankabanditka [31]
No, because all multiples of 5 end with 5 or 0
3 0
3 years ago
Read 2 more answers
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